A rock dropped from a 5-m height accelerates at 10 m/s2 and ...

[mynx]

A rock dropped from a 5-m height accelerates at 10 m/s2 and strikes the ground 1 s later. If the rock is dropped from a height of 2.5 m, its acceleration of fall is
 
  A) half.
  B) the same.
  C) twice.
  D) four times as much.

Question 2

A ball starting from rest at the top of an inclined plane accelerates at 2 m/s2 and reaches the bottom of the plane in 3 seconds. What is the length of the plane?
 
  A) 2 m
  B) 3 m
  C) 5 m
  D) 9 m

[jackie]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: D

[mynx]

Thanks

[jackie]

Welcome