5. A sled of mass M is sliding at speed v, on a frozen lake when it hits a patch of rough ice and eventually comes to a stop. The coefficient of kinetic friction between the sled and the rough ice patch is µk. a. How much mechanical energy becomes thermal energy as the sled comes to a stop? b. How far does the sled slide before coming to a stop?

I need help with these questions

a. A 10.0 kg object has an initial velocity of (5.0i + 3.0j) m/s. What is its kinetic energy at this time? KE = ½ mv² where v² = V.V

A diver of mass 68 kg stands on a diving board 5.0 m above a pool. At the moment of the jump, the diving board transfers its 3400 J of energy to the diver, who leaves the board at an angle of 35°. a. What is the speed of the diver just before they enter the water? b. Suppose that when the diver enters the water, they experience an acceleration of a->water= +4 m/ss J. What is the minimum depth of the pool necessary so that this diver comes to rest exactly at the bottom of the pool

If you have a ball with a mass of 6.00kg, that has an initial velocity of vA=(2.00i + 5.00j)m/s and a final velocity of vB=(-2.00i + 8.00j)m/s, What is the Work done on the ball if the work only changes the kinetic energy?   a. 234 Joules   b. 117 Joules   c. 93 Joules   d. -13 Joules   e. 95 Joules

A hand pushes a 3 kg block along a table from point A to point C as shown in the figure below. The table has been prepared so that the left half of the table (from A to B) is frictionless. The right half (from B to C) has a non-zero coefficient of friction equal to µ. The hand pushes the block the full distance from A to C using a constant force of 5 N. The block starts off at rest at point A and comes to a stop when it reaches point C. The distance from A to B is 0.5 m and the distance from B to C is also 0.5 m. We will consider the block by itself as our system so all forces on the block are external. Initial position of block Final position ofblock P no friction friction A B C -1½ m 1½ m

A baseball hits the catcher’s glove with a horizontal velocity of 55m/s. The mass of the baseball is 0.15kg. The displacement of the ball due to the deformation of the catcher’s glove and the movement of the catcher’s hand is 23cm from the instant the ball makes contact with the glove until it stops. a. How much kinetic energy does the baseball have just before it strikes the glove? b. How much work does the catcher have to do to the ball during the catch and is it positive or negative? c. What is the average impact force exerted by the glove on the baseball? Answer parts a-c. Include units and direction.

You take a 13kg bag of lead pellets and drop it from 2m above the ground.a. How much gravitational potential energy does the bag have when held 2m above the ground?b. The bag is dropped. Just before it hits the ground, how much kinetic energy does it have?c. How fast is the bag moving just before it hits the ground?d. When it hits the ground, the kinetic energy will be transformed mostly into thermal energy. If 40%of this energy goes into the lead pellets as heat, what will be the increase in temperature of thelead? Assume led has a specific heat capacity of 160J/kg·K.

A man pulls a 25 kg box in a horizontal fashion with 60N of force over a surface with us = 0.15 and uk = 0.05. a. After pushing it for 10m, how much thermal energy is produced? b. What is the net work done on the system? Draw a FBD.

i just need help with C and D A big ship with a mass of 5.95 x 10 7 kg has a speed of 11.0 m/s at some instant. A. What is the ship’s kinetic energy?   B. How much work is required to stop it?   C. How is work related to the mechanical energy?   D. What is the magnitude of the constant force required to stop it as it undergoes a displacement of 2.75 km?