Please answer the physics questions?????????

Posted on 2014-11-21 06:30:00 in Physics by PHILIP

An 600g hockey puck slides along an ice surface accelerating at -0.250m/s (squared). Calculate the coefficient of friction of the pluck with the ice. Next question:

#2 The coeifficient of friction between a sled and snow is 0.35. If an 8.6 sled is pushed with a force of 40, at what rate will the sled accelerate?

#3. A 5.0kg wagon, initially at rest is pushed to a speed of 3.0 m/s in a time of 4.0 seconds. If the coefficient of friction is 0.10 then what is the magnitude of the push force acting on the wagon?

#4 A 2.0kg physics book is thrown straight down with an initial speed of 3.0 m/s. If an air friction force of 5.0N is acting, how fast Is the book moving after 1.6 seconds. Can someone answer this with work for me please with work shown :)

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