A girl pulls a sled with a force of 15 N over a distance of 3 m. What is the kinetic energy of the sled after she pulls it? Assume there is no friction.

Question

asked Feb 27, 2018 195k views

2 Answers

Sajattack · Answer 1 · 2018-03-03T21:27:22+0000

Answer:

Kinetic energy, KE = 45 J

Step-by-step explanation:

It is given that,

Force applied by girl on a sled, F = 15 N

It moves a distance, d = 3 m

We need to find the kinetic energy of the sled after she pulls it. We know that the work done is equal to the change in kinetic energy

$W=\Delta E=K_f-K_i$

K_i=0 (initial at rest)

KE=W=F* d

$KE=15\ N* 3\ m=45\ J$

So, the kinetic energy of the sled after she pulls it is 45 J. Hence, this is the required solution.