An engineering student examining the scene of an accident, observe skid marks 30.0 m long by a 1600 kg car. The car skidded to a stop on a concrete highway having a coefficient of kinetic with the tires of 0.75. Estimate the cars speed at the beginning of the skid.

MY NOTES ASK YOUR TEACHER A frictionless plane is 10.0 m long and inclined at 30.0°. A sled starts at the bottom with an Initial speed of 5.10 m/s up the incline. When the sled reaches the point at which it momentarily stops, a second sled is released from the top of the incline with an initial speed v,. Both sleds reach the bottom of the incline at the same moment. (a) Determine the distance that the first sled traveled up the Incline. (b) Determine the initlal speed of the second sled. m/s

A 7-kg toboggan is kicked on a frozen pond, such that it acquires a speed of 2.1 m/s to the right. The coefficient of friction between the pond and the toboggan is 0.17. Determine the distance that the toboggan slides before coming to rest.

In the sport of curling, players slide a 20.0 kg granite stone down a 38.0 m long ice rink. The coefficient of kinetic friction of the stone on ice is 0.0168. Calculate the initial speed of the stone, if it comes to rest after travelling 38.0 m, assuming that it travelled in a straight line and does not rotate while sliding. O 4.38 m/s O 6.02 m/s 3.58 m/s O 342 m/s