Which of the following quantities is a vector?

• Speed

• Distance

• Work

• Acceleration

A body moves with a constant velocity when

• the resultant force is zero

• acceleration is increasing

• friction is large

• force is increasing

Which of the following is NOT a fundamental quantity?

• Length

• Mass

• Temperature

• Area

The turning effect of a force is called

• Work

• Power

• Moment

• Impulse

The acceleration due to gravity on the moon is approximately

• 9.8 m/s²

• 5.5 m/s²

• 1.6 m/s²

• 20 m/s²

A simple pendulum has a period of 2 s. What is its frequency?

• 0.5 Hz

• 1 Hz

• 2 Hz

• 4 Hz

The area under a velocity-time graph represents

• Acceleration

• Displacement

• Speed

• Force

A machine has a mechanical advantage greater than 1 if

• it moves fast

• the effort is greater than the load

• it multiplies force

• efficiency is 100%

The efficiency of a machine is always less than 100% due to

• increase in velocity

• work done against friction

• increase in power

• decrease in speed

The point where the weight of an object acts is called

• center of mass

• center of gravity

• equilibrium point

• inertia point