SPS501 Class Revision

What is linear displacement?

• Length of path travelled

• distance covered over the time taken

• change in location

What is the angle formed by a body segment with respect to horizontal?

• acute angle

• relative angle

• absolute angle

• none of the above

If a diver goes from a full layout position to a tuck position, what will happen to her angular velocity?

• increase

• decrease

• remain the same

• need more information

If an airborne performer wishes to maximize the number of revolutions she spins, she should extend the limbs as far from the axis of rotation as possible

• true

• false

A motionless object sitting on a motionless surface, with no horizontal force application, has no friction.

• true

• false

In the absence of external torque, which of the following will increase when moment of inertia decreases?

• angular momentum

• angular velocity

• both A & B

• none of the above

What is the angular analogue of moment of inertia?

• moment of force

• moment of time

• surface area

• mass

A ball rolls with an acceleration of -0.5 m/s². If it stops after 7 seconds, what was its initial speed?

• 3.0 m/s

• 3.5 m/s

• 35 m/s

From a mechanical perspective, it is easier to pull an object than to push it.

• true

• false

Angular impulse is the product of ______ and _______

• torque , mass

• torque, time

• time, mass