Accelerating motion Test

What is the acceleration?

• It is the rate of change of velocity with time.

• The distance taken over time.

• (v_f-v_i)/t

• The speed of the body.

What is the mark of acceleration?

• m/s²

• a

• A

• v

What is the unit of acceleration?

• a

• m/s

• A

• m/s²

What kind of quantity is the acceleration?

• scalar

• vector

• non of them

An object moves by constant speed but changes the direction. Does it accelerate?

• yes

• no

• It depends on the speed of it.

What is the speed-time graph of UAM?

• 
• 
• 
• 

What is the speed-time graph of steady decelerating motion?

• 
• 
• 
• 

Which graph means steady (non accelerating) motion?

• 1

• 2

• 3

• Non of them

What is the difference between the accelerations of 1 and 2 graphs?

• 1 is more

• 2 is more

• both decelerate

• same acceleration

What is the definition of free fall?

• No force exerting on the body.

• Just two forces exerting on the body.

• Just the gravitational force exerting on the body.

• The body moves in steady motion.