ECAT Physics 2

If a body starts from a point and then returns to the same point, then its

• Average velocity is zero but not average speed.

• Average speed is zero but not average velocity.

• Both average speed and velocity is zero.

• Average speed and average velocity depends upon the path.

If the initial velocity of a projectile be doubled, keeping the angle of projection same, the maximum height reached by it will

• Remain the same

• Be doubled

• Be quadrupled

• Be halved

Under what condition the average velocity of a body is equal to its instantaneous velocity?

• Uniform Velocity

• Uniform Acceleration

• Variable velocity

• Variable Acceleration

A ball is projected at 45° its horizontal range is 10m. Velocity of projection is

• 5 ms-1

• 15 ms-1

• 10 ms-1

• 20 ms-1

3rd law of motion explains.

• Effect of force

• Existence of a force

• Existence of two forces

• Existences of pair of forces in nature

If a stone is released from moving train, then the stone will follow

• Hyperbolic path

• Straight path

• Parabolic path

• Circular path

A body of mass m collides against a wall with a velocity v and rebounds with the same speed. Its change of momentum is

• 2 mv

• -mv

• mv

• Zero

When velocity time graph is a straight line parallel to time axis then

• acceleration is const

• acceleration is variable

• acceleration is zero

• velocity is zero

What is the angle of projection for which the range and maximum height become equal?

• tan-1 ¼

• tan-1 4

• tan-1 ½

• tan-1 2

Distance covered by a freely falling body in 2 seconds will be:

• 4.9 m

• 19.6 m

• 39.2 m

• 44.1 m