Which of the below units is equivalent to kgms-¹ _?

• Ns-¹

• Nms

• Ns

• J/s

A stationary ball is hit by an average force 50N at time of 0.03s. What is the impulse experienced by the body?

• 1.5Nm

• 1.5Ns

• 0.0006Nm

• 0.0006Ns

The maximum displacement of a body from its equilibrium position is called

• period

• frequency

• displacement

• amplitude

A body of mass 3kg moves with a velocity

10m/s. Calculate the momentum of the body.

• 30kgm/s

• 3.33kgm/s

• 0.3kgms

• 0.03kgms

To every action there is an equal and opposite reaction is called Newton’s

• First law of motion

• Second law of motion

• Third law of motion

• Conservation of linear momentum

What is the unit of pressure in SI system of units?

• Pa

• W

• J

• Atm

The magnitude of the force required to make an object of mass, m move with speed, v in a circular path of radius, r is given by the expression.

• mr/v

• mr²/v

• mv²/r

• mv/r²

A footballer taking a penalty kick applies a force of 100N

for 0.03s on a ball of mass 150g. The ball moves off

with a speed of what?

• 10m/s

• 20m/s

• 30m/s

• 40m/s

Which of the following is a vector quantity

• mass

• speed

• density

• momentum

The time rate of change of momentum is called

• weight

• gravity

• force

• impulse