During the motion of a projectile fired from the earth surface, ______. (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant

During the motion of a projectile fired from the earth surface, ______. (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant
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(4) horizontal component of its velocity remains constant Explanation: The motion of a projectile is a two-dimensional motion—Horizontal motion and vertical motion—that take place independent of each other. The horizontal velocity of a projectile is constant (a never changing in value). The force of gravity continuously affects the vertical component, so the vertical motion is a uniformly accelerated motion.
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During the motion of a projectile fired from the earth surface, _______ (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant

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Last Answer : horizontal component of its velocity remains constant

After a projectile is fired horizontally near the earth's surface, the horizontal component of its velocity, neglecting any air resistance: w) increases steadily x) decreases steadily y) first decreases, then increases z) remains constant

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Last Answer : ANSWER: Z -- REMAINS CONSTANT 

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A projectile is fired at an angle to the vertical. Its horizontal range will be maximum when is (A) 0° (B) 30° (C) 45° (D) 60°

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How does the unbalanced force of gravity affect the horizontal and vertical velocity of an object in projectile?

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A spring with a force constant of 20 newtons per meter is known to obey Hooke's Law. The spring is attached to a mass of 5 kilograms and placed on a horizontal, frictionless surface. The mass is displaced 3 meters from its equilibrium position and released. What is the kinetic energy of the mass as it passes through its equilibrium position?

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If two different gases have the same volume, temperature, and pressure and behave like ideal gases, they will also be identical in which one of the following ways? w) average molecular velocity x) total mass y) total molecular kinetic energy z) average momentum per molecule

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Last Answer : decelerates

Projectile will attain its maximum range, if it is fired at an angle of A. 30° B. 47° C. 90° D. 45°

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Last Answer : 45°

A projectile is fired into the air at an angle of 23 degrees. At what other angle would this projectile have the same range if air resistance is neglected? w) 46 degrees x) 60 degrees y) 67 degrees z) 68 degrees

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Volute of a centrifugal pump should be designed in a fashion, such that the (A) Kinetic head gets converted into static head (B) Moving stream gradually reduces velocity (C) Mean velocity remains constant (D) None of these

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Last Answer : the pressure at any part + the kinetic energy per unit volume + the potential energy per unit volume = constant

A block slides down a smooth inclined plane when released from the top while another falls freely from the same point. The value of which parameter in the two cases will be identical? a.Time taken to reach the ground b.Kinetic energy at the ground c.Momentum at the ground d.Velocity while touching the ground e.Kinetic energy after one second

Description : A block slides down a smooth inclined plane when released from the top while another falls freely from the same point. The value of which parameter in the two cases will be identical? a.Time ... ground c.Momentum at the ground d.Velocity while touching the ground e.Kinetic energy after one second

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If the horizontal range of a projectile is four times its maximum height, the angle of projection is

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Last Answer : 45°

A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is – (1) zero (2) one (3) less than one (4) more than one

Description : A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is – (1) zero (2) one (3) less than one (4) more than one

Last Answer : (1) zero Explanation: The rifle and bullet have zero momentum and zero kinetic energy to start with. When the trigger is pulled, the bullet gains some momentum in the forward direction, but this is ... The kinetic energies of the gun and bullet are both positive scalars, however, and do not cancel.

A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is (1) zero (2) one (3) less than one (4) more than one

Description : A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is (1) zero (2) one (3) less than one (4) more than one

Last Answer : zero

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Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states that? (1) Newton’s first law (2) Newton’s Second Law (3) Newton’s Third Law (4) Principle of conservation of linear momentum

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Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

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If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

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Description : Froude number is significant in (A) Supersonics, as with projectile and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion ... gravity forces, and wave making effect, as with ship's hulls (D) All of the above

Last Answer : Answer: Option C

Reynolds number is significant in (A) Supersonics, as with projectile and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls (D) All of the above

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Pulverised fuel fired furnaces employ __________ fuel firing. (A) Horizontal (B) Vertical (C) Tangential (D) All (A), (B) and (C)

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Choose the wrong statement (A) The horizontal component of the hydrostatic force on any surface is equal to the normal force on the vertical projection of the surface (B) The horizontal component acts through the center of pressure for the vertical projection (C) The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area (D) The vertical component passes through the center of pressure of the volume

Description : Choose the wrong statement (A) The horizontal component of the hydrostatic force on any surface is equal to the normal force on the vertical projection of the surface (B) The horizontal component ... above the area (D) The vertical component passes through the center of pressure of the volume

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An 8 kilogram mass resting on a frictionless horizontal surface is attached to a spring with a force constant of 50 Newtons per meter. If the velocity of the mass through the equilibrium position is 5 meters per second, what is the mass's maximum displacement from equilibrium?

Description : An 8 kilogram mass resting on a frictionless horizontal surface is attached to a spring with a force constant of 50 Newtons per meter. If the velocity of the mass through the equilibrium position is 5 meters per second, what is the mass's maximum displacement from equilibrium?

Last Answer : ANSWER: 2 METERS

What are the two kinds of Rotatory motion? (1) Spin and Vibrational motion (2) Spin and Orbital motion (3) Spin and Translatory motion (4) Spin and Projectile motion

Description : What are the two kinds of Rotatory motion? (1) Spin and Vibrational motion (2) Spin and Orbital motion (3) Spin and Translatory motion (4) Spin and Projectile motion

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What are the two kinds of Rotatory motion? (1) Spin and Vibrational motion (2) Spin and Orbital motion (3) Spin and Translatory motion (4) Spin and Projectile motion

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A body moving in a circular path with a constant speed has a (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement

Description : A body moving in a circular path with a constant speed has a (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement

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The kinetic energy of a stone falling near the earth's surface through a vacuum increases with the: w) square root of its velocity x) cube root of its velocity y) square of its velocity z) cube of its velocity

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Description : A moving bullet hits a solid target resting on a frictionless surface and gets embedded in it. What is conserved in this process? (a) Both momentum and kinetic energy (b) Kinetic energy alone (c) Momentum alone (d) Neither momentum nor kinetic energy

Last Answer : Ans:(c)

Can momentum be hidden to human eyes like how kinetic energy can be hidden as heat? -Physics

Description : Can momentum be hidden to human eyes like how kinetic energy can be hidden as heat? -Physics

Last Answer : Yes and no. In a regular mechanical system with macroscopic parts, momentum can not be "hidden" to human eyes. But in other systems, momentum can be hidden. For instance, in an electromagnetic system, ... it is really only hidden to human eyes. We can detect radio waves just fine with an antenna.