Aforce of 20 n acts on a 2 kg mass for 10 seconds, what is the change in speed of mass? a)20 m/s b)10 m/s c100 m/s d)200 m/s

C) 100 m/s

Explanation:

From the impulse theorem, the change in momentum of an object is equal to the product between the force applied on the object and the time interval during which the force is applied:

where the term on the left is the change in momentum, and where

m = 2 kg is the mass

is the change in speed

F = 20 N is the force applied

is the time of the collision

Re-arranging the equation, we find the change in speed:

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )