Physics Unit 1 Test

Force is measured according to which law of motion

• 1^st

• 3^rd

• 2^nd

• All

Range of a projectile on a horizontal plane is same for the following pair of angles:

• 15° and 18°

• 43° and 47°

• 20° and 80°

• 52° and 62°

A body moves from point P (3, 4) to Q (5, 7). Its displacement vector would be

How is the motion of a body affected by balanced and unbalanced forces acting on it?

• A

• B

• C

• D

A force of 10 N acts on a body of mass 1 kg for 5 sec to a distance of 10 m. The rate of change of momentum is:

• 50 N

• 25 N

• 20 N

• 10 N

The displacement after half a circle of radius “r” would be

• πr

• Zero

• 2r

• non-uniform motion

A baseball is thrown vertically into the air. The acceleration of the ball at its highest point is

• 2g, down

• g, up

• Zero

• g, down

At what angle of projection, horizontal and vertical component of velocities have same values?

• 30^o

• 45^o

• 60^o

• 90^o

Accelerating frame of reference which has constant acceleration is

• Constant moving car

• Moving train

• Free falling body on earth

• None of these

A body of mass M collides against a wall with a velocity v and retraces its path with the same speed. The change in momentum is (take the initial direction of the velocity as positive)

• 2Mv

• –2Mv

• Mv

• Zero