Oh yeah! I did Eg = mgh; I found the haight using sinelaw then plugged that in. Then I found the Kinetic energy and subtracted that from the Eg which was the W then used the equation W = Ff(costheta)(deltad) and that's how the I got the Force of Friction. Thanks!
1. Question.
A 15 kg child slides from rest, down a playground slide that is 4.0m long. The slide makes a 40degree angle with the horizontal. The child's speed at the bottom is 3.2 m/s. What was the force that the slide was exerting on the child?
Answer: 75 N [up the slide]
2. My Attempt.
Ek...