2. A basketball of mass 0.0400 kg is dropped from a height of 5.00 m to the ground and bounces back to a height of 3.00 m. On its way down, how much potential energy does the ball lose? b. On its way back, how much potential energy does the ball regain? a.
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- A basketball of 0.400 kg is drop of a height of 5.00 m to the ground and bounce back to a height of 3.00 m a. On its way down,how much potential energy does the ball lose? b. On its way back,how much potential energy does the ball regain?1. Which of the following is NOT an example of potential energy? a. A running woman b. An incredibly compressed spring G. A tightly stretched rubber band d. An apple dangling off a branch 2. A ball drops from a height h. What more do we need to calculate initial potential energy? a. Elasticity of the Ball b. Mass c. Final Velocity d. Horizontal DisplacementYou 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.
- X Problem 1. An NFL punter punts a 0.02 kg football 100 meters into the air. A. What is the initial potential energy of the ball when it's at its peak? 0.02 x 9.8 x 100 = 19.6 j What is its final kinetic energy before it hits the ground? 1 o add speaker notes B. C. What is the velocity of the ball before it hits the ground? در نگاه U EVAA 1.0 kg cart is sliding to the right on a frictionless surface with speed 2 m/s. It collides head-on and sticks to a 0.5 kg cart that is sliding to the left with speed 4 m/s. What is the kinetic energy of the combined carts after the collision? (Hint: Make a table!) A.6 J B.0 J C.2 J D.4 J2. A 3.2 kg ball that is moving straight upward has 17 J of kinetic energy and its total mechanical energy is 25 1. a. Find the gravitational potential energy of the ball. b. What is its height above the ground? c. What is the speed of the ball? d. What will be its gravitational energy when it is at Its highest point above the ground? e. What is the maximum height above the ground? f. What will be its speed Just before it lands on the ground? and Given: quired: ution:
- 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 (total) speed of the diver just as they leave the diving board? b. What is the maximum height (relative to the surface of the water) of the diver? c. How long does it take for the diver to reach the surface of the water?2. An object has 560 J of potential energy and 890 J of mechanical energy. How much kinetic energy does the object have?. ME = REHPE 560 560 330J= PE olog ertev 3. A slingshot rubber band with a spring constant of 850 N/m was stretched 0.33 m. A 0.4 kg rock was fired from the slingshot after it was released. a. Find the spring potential energy. PE =)2 kx? Z(850X.33) b. What is the kinetic energy of the stone once it was released? PEERE c. What is the velocity of the stone as soon as the slingshot was released?Superman can throw a ball (mass 145 g) 1000 m/s. Suppose Supermanthrows a ball straight up into the air at 1000 m/s. i. What is the initial kinetic energy of the ball? ii. How high would the ball go if the force ofgravity is constant F = −mg? (use conservation of energy and neglect air resistance). iii. How high would the ball go if you use F = − (GMEm/ r2) ? ME = 5.97 × 1024 kg, and assume the ball is thrown from rE = 6.37 × 106 m
- A 0.2 kg ball is bounced off the floor from a vertical height of 1.5m. The ball rebounds upward with 0.6 J less energy than it had upon contact with the floor. To what vertical height of the ball bounce upward? A. 0.30m B. 1.2m C. 0.90m D. 1.5mYou throw a basketball straight up into the air with an initial velocity of 5.6 m/s. The ball leaves your hand 1.2 meters above the ground. It moves upwards, stops, and then goes all the way down until it hits the ground (below the height you threw from).A. Use conservation of energy (and not the kinematics equations) to calculate the velocity of the ball the instant before it hits the ground.A 72 kg skiier goes down a 45 meter tall hill and reaches 26 m/s at the bottom of the hill. What is the percentage of the total energy that was lost to friction? A.17% B.23% C.52% D.46% E,31%