The decrease in velocity per unit time is called:
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Decrease in velocity per unit time is retardation.
When the values of average and instantaneous acceleration are equal, the body is said to be moving with:
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Constant acceleration means average and instantaneous acceleration are equal.
The laws of motion show the relation between:
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Newton's laws relate force, mass and acceleration.
Acceleration of 1.5 m s⁻² expressed in km h⁻² is:
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Convert m s⁻² to km h⁻² by multiplying by 3.6²/1000.
The force which produces an acceleration of 1 m s⁻² in a body of mass 1 kg is equal to:
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The quantity of matter in a body is called:
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Mass is the quantity of matter in a body.
Pull of earth on a mass of 20 kg on the surface of earth is:
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Weight = mg with g ≈ 9.8 m s⁻².
Laws of motion are valid in a system which is:
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Newton's laws apply directly in inertial reference frames.
If the velocity of a body is decreasing its acceleration is:
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Taking the direction of velocity as positive, decreasing velocity means negative acceleration.
A bullet fired into a fixed wooden block loses half its velocity after penetrating 60 cm. It comes to rest after penetrating a further distance of:
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Use v² = u² + 2as for uniform retardation.
From the top of a building, 16 m high, water drops are falling at equal intervals of time such that when the first drop reaches the ground, the fifth drop just starts. The distance between the successive drops, in meters, at that instant is:
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Use s = ½gt² for the five equally timed drops.
The dimension of velocity is:
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Velocity = displacement/time.
In an inelastic collision:
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Kinetic energy is not conserved in an inelastic collision.
When the body moves with constant acceleration, the velocity-time graph is:
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Constant acceleration gives a constant slope on a velocity-time graph.
The motion of the rocket in the space is according to the law of conservation of:
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Rocket propulsion is explained using conservation of linear momentum.
The area between the velocity and time axis in the velocity-time graph is numerically equal to the:
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The area under a velocity-time graph gives displacement; for the stated motion it represents distance covered.
A collision in which the K.E. of the system is not conserved is called:
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Inelastic collisions do not conserve kinetic energy.
When the body moves with increasing acceleration, the velocity-time graph is:
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Increasing acceleration means the slope of the velocity-time graph changes.
During the projectile motion, the horizontal component of velocity:
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Ignoring air resistance, horizontal acceleration is zero.
A force is applied on a body produces in its 'own direction'. This is the statement of:
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Newton's second law relates force to acceleration in the direction of the net force.
