Gravitation numericals

A ball is thrown vertically upward with an initial speed of 20 m/s. (Assume g=10 m/s².)
What is the maximum height reached by the ball?

• A) 10 m
  
  
  

• B) 20 m

• C) 30 m

• D) 40 m

A stone is thrown upward with an initial speed of 15 m/s. How long does it take for the stone to return to the thrower?

• A) 1.5 s
  
  

• B) 2.0 s

• C) 3.0 s
  

• D) 3.5

A stone is dropped from rest from a tower of height 45 m. How long does it take to hit the ground?

• A) 2 s
  

• B) 3 s
  

• C) 4 s
  

• D) 6 s

A ball is thrown upward with an initial speed of 25 m/s. What is its speed after 2 seconds?

• A) 5 m/s (upward)
  

• B) 15 m/s (upward)
  )

• C) 25 m/s (upward)
  

• D) 5 m/s (downward

A ball is dropped from rest from a height of 80 m. What is its speed just before it hits the ground?

• A) 20 m/s
  

• B) 30 m/s
  

• C) 40 m/s
  

• D) 50 m/s

An object is thrown upward from the top of a 20 m high building with an initial speed of 5 m/s. (Take g=10 m/s².)
Determine the total time taken for the object to hit the ground

• A) 2.56 s
  

• B) 3.5 s
  

• C) 4.3 s
  

• D) 7.2 s

A ball is thrown downward from a height of 20 m with an initial speed of 5 m/s. Using g=10 m/s2 what is its speed just before hitting the ground?

• A) 15 m/s
  

• B) 20 m/s
  

• C) 20.6 m/s
  

• D) 25 m/s

A ball is thrown upward with an initial speed of 20 m/s. What is the height of the ball after 2 seconds?

• A) 10 m
  

• B) 20 m
  

• C) 30 m
  

• D) 40 m

An object is thrown upward from the top of a 30 m high cliff with an initial speed of 10 m/s. Using g=10 m/s2, find the total time taken for the object to hit the ground.

• A) 2.65 s
  

• B) 3.0 s
  

• C) 3.65 s
  

• D) 4.0 s

A ball is thrown upward with an initial speed of 16 m/s. At what height will its speed reduce to 8 m/s?
(Assume g=10 m/s2)

• A) 4.8 m
  

• B) 7.2 m
  

• C) 9.6 m
  

• D) 12.8 m