Given :
A tourist drops (from rest) a ping pong ball from the top of the tower, which has a height of 174 meters.
To Find :
How long does it take for the ping pong ball to hit the ground ?
Solution :
We know, equation of motion of object doing free fall is :
....1)
Here, g = 9.8 m/s² ( acceleration due to gravity )
Also, u = 0 m/s ( its free fall )
Putting these values in equation 1), we get :
Therefore, ball will take 5.96 s to hit the ground.
Answer:
25 m/s
Explanation:
The car's momentum is increased by the amount lost by the truck
750(15) + 7500 = 18750 kg•m/s
18750 / 750 = 25 m/s
Answer:
the average speed of the blocks is 0.36 m/s