Quiz: 10 PHYS SEM 1 Revision

Which of the following best defines "force"?

• The amount of matter in an object.

• A push or pull.

• The speed of an object in a given direction.

• The energy an object possesses due to its motion.

What is a "scalar quantity"?

• A quantity that has only direction.

• A quantity that has both magnitude and direction.

• A quantity that is fully described by a magnitude (or numerical value) alone.

• A quantity that changes over time.

A toy car accelerates from rest to a velocity of 2 m/s in 4 seconds. What is its average acceleration?

• 0.5 m/s2

• 2 m/s2

• 8 m/s2

• 0.25 m/s2

What is meant by "average speed"?

• The speed of an object at a specific instant in time.

• The total distance travelled divided by the total time taken.

• The change in velocity divided by the time taken.

A cyclist travels 300 m [E] (East), then 600 m [W] (West), and finally 200 m [E] (East). What is the total displacement of the cyclist?

• 1100 m [E]

• 100 m [W]

• 100 m [E]

• 500 m [E]

A train has an initial velocity of 10 m/s and accelerates at 1.5 m/s2 for 15 seconds. What is the final velocity of the train? (Formula: a=(v–u)/t)

• 22.5 m/s

• 32.5 m/s

• 25 m/s

• 11.5 m/s

A car of mass 1200 kg is traveling at 20 m/s. The driver applies the brakes, and the car comes to a complete stop in 5 seconds. What is the magnitude of the average braking force applied to the car?

• 4800 N

• 2400 N

• 960 N

• 12000 N

Which of the following best describes Newton's Third Law of Motion?

• An object at rest stays at rest unless acted upon by a force.

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

What is the fundamental definition of force?

• The ability to do work

• A push or pull

• The rate of change of velocity

• The resistance to motion

Which of the following best defines a scalar quantity?

• A) A quantity that has both magnitude and direction

• B) A quantity that is always positive

• C) A quantity that is fully described by a magnitude (or numerical value) alone

• D) A quantity that changes with time