A 70 kq person is sliding down a sliding board. The board has an angle of 50 degrees. The Uk is 0.1. How fast is the person going after 2.0 seconds?

In the rollercoaster shown in the figure, the height of the first hill is 24.5 meters, and the height of the second hill is 12.8 meters. The track of the rollercoaster is frictionless.    If the rollercoaster car’s velocity is 20.4 m/s, what was its velocity at the top of the first hill?  v =    m/s

An airplane starts from 17.8 m/s and accelerates at 11 m/s2. What is its speed at the end of a 340 m runway?

A block is sliding along a frictionless surface at 11.1 m/s.  The block slides down a hill.  At the bottom of the hill, the block is sliding at 36.5 m/s.  How tall (in meters) is the hill?

A 1.4 gram bullet is shot into a tree stump. It enters at a velocity of 341 m/sec and comes to rest after having penetrated the stump in a straight line. It takes 0.00032 sec to come to a stop after striking the stump. What was the force on the bullet during impact?  (answer in Newtons)

Compressed air is used to fire a 46.0 g ball vertically upward from a 1.8-m-tall tube. The air exerts an upward force of 2.8 N on the ball as long as it is in the tube. How high (in m) does the ball go above the top of the tube, assuming that the acceleration due to gravity is 9.80 m/s2?

The muzzle velocity of a typical 500 g spud is 25 m/s . The force given by the spud is K/(x+.09) where x is the distance of the barrel in meters. If the length of the barrel is 75 cm, what is the constant K? What is the force on the spud?

An constant applied force of 40.1 N lifts an 2.50 kg mass straight up, resulting in a final speed of 3.6 m/s. What distance did the mass move if it was initially at rest?

A child riding a bicycle has a total mass of 30.6 kg. The child approaches the top of a hill that is 27.9 m high 27.9 and is 86.8 m (ℓ)  long at 12.1 m/s. If the force of friction between the bicycle and the hill is 26.7 N, what is the child's velocity at the bottom of the hill? (Disregard air resistance, g = 9.8 m/s2.)

You are playing a game and you push a cart to give it in. speed. The cart starts at the bottom (zero) of a ramp and after reaching the top of the ramp, the cart travels across a horizontal track w/ friction. The mass of the cart is 44 x 10^-3 kg. The ramp is 56 cm high. The length is 70 cm. What can you infer of the intial speed in (m/s)