A ball weighing 0.2kg rolls along the ground. It has a speed of 3 m/s eventually rolls up a hill. a). Calculate the total energy of the ball b). At its highest point on the hill, the ball as a height of 0.1m above the ground. Is energy conserved for the ball

A huge cruiser with a mass of 6.50x107 kg has a velocity of 12 m/s in a instant. A. What is the kinetic energy of the spacecraft at this time? B. How much work does it take to stop it? C. What is the magnitude of the constant force to stop it, if it has a 2.5 kilometer displacement?

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. Calculate the potential energy of a 75 Kg boulder sitting at the edge of a cliff that is 210 meters from the ground (yf=0). b. If the boulder is suddenly pushed over the side of the cliff what is the velocity of the boulder when it is 50 meters from the ground?

Timmy (m=50kg) is at the top of a 7m tall hill. a. What type of energy does he have at the top of the hill? b. What is his potential energy? c. What type of energy does he have at the bottom of the hill? d. What is his speed at the bottom of the hill, after he slides down it? e. The hill has a river at the bottom, that causes two things. First is a vertical drop of 2m, second is a horizontal gap. What distance is the gap if Timmy makes the jump? Here you may also assume that at the bottom of the hill Timmy flies horizontally off.

4. A 200 kg boulder slides down a hill. At the bottom of the hill its velocity is 2.2 m/s. a. What is the kinetic energy of the stone? b. What is the potential energy of the stone at the top of the hill before it starts to roll down? c. How high is the hill?

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.

A 500 kg cart rests atop a hill 30.0 m high on a roller coaster. Its gravitational potential energy is measured relative to the bottom of the hill. The cart then rolls down the hill. Which of these best describes what is happening in this situation?   a. the total mechanical energy of the cart is decreasing, the kinetic energy of the cart is increasing, and the gravitational potential energy of the cart is increasing   b. the total mechanical energy of the cart is increasing, the kinetic energy of the cart is increasing, and the gravitational potential energy of the cart is increasing   c. the total mechanical energy of the cart is increasing, the kinetic energy of the cart is increasing, and the gravitational potential energy of the cart is decreasing   d. the total mechanical energy of the cart is increasing, the kinetic energy of the cart is decreasing, and the gravitational potential energy of the cart is increasing   e. the total mechanical energy of…

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.