If a ball is given an initial speed of 15 m/s on a horizontal, frictionless surf
ID: 1971916 • Letter: I
Question
If a ball is given an initial speed of 15 m/s on a horizontal, frictionless surface, how fast will the ball be rolling in 5 seconds?The impulse given to a ball with mass of 2.0 kg is 16 N.s. If the ball were already moving at 3.0 m/s, what would the final velocity be? (Remember that v = Vfinal - Vinitial )
A boy (m = 50kg) at rest on a skateboard is pushed by another boy who exerts a force of 200 N on him. If the first boy's final velocity is 8 m/s, what was the contact time?
the rise is 0.01 cm for each 2 cm of run, how far will the ball travel horizontally on the slope?
the rise is only 0.5 cm for each 2 cm of run, how far will the ball travel horizontally on the slope?
Explanation / Answer
If a ball is given an initial speed of 15 m/s on a horizontal, frictionless surface, how fast will the ball be rolling in 5 seconds?
initial speed = 15 m/s
so, Using Newton's first law
a body remains at rest or in motion with a constant velocity unless acted upon by an external force.
The ball rolls on at 15 m/s after 5 seconds.