A handball player hit a ball with a mass of 0.25 kg. The ball travels at a velocity of 15 m/s for 0.75 s until it hits the wall.

What was the average acceleration of the handball?

A.
20m/s

B.

0.05 m/s²

C.
0.05 m/s

D.

20 m/s²

Question

A handball player hit a ball with a mass of 0.25 kg. The ball travels at a velocity of 15 m/s for 0.75 s until it hits the wall. 

 

What was the average acceleration of the handball?
	
	
 
A.
	20m/s
	
 
B.
	

0.05 m/s²
	
 
C.
	0.05 m/s
	
 
D.
	

20 m/s²

anonymous · Answer

It seems you're missing some information.

anonymous · Answer

i put all the necessary information in that question

anonymous · Answer

Are you saying that the time from when the ball is hit by the racket to when it hits the wall is 0.75s and that the ball is traveling 15m/s when it hits the wall?

anonymous · Answer

yes

anonymous · Answer

Then acceleration is given by:$$a=\frac{ v _{f}-v _{0} }{ t }$$where a is acceleration; vf is the final velocity; v0 is the original velocity; and t is time.  Watch your units.

anonymous · Answer

can you help with another one

anonymous · Answer

A football player kicks a ball with a mass of 0.42 kg. The average acceleration of the football was 14.8 m/s². 

 

How much force did the kicker supply to the football?
	
	
 
A.
	35.24 N
	
 
B.
	

6.22 m/s²
	
 
C.
	

35.24 m/s²
	
 
D.
	6.22 N

anonymous · Answer

$$F=ma$$where F is force; m is mass; and a is acceleration.

anonymous · Answer

so which one is it

anonymous · Answer

Multiply the ball's mass by it's acceleration.