A 5 kg block slides on a surface with friction (mu = 0.1). If the initial KE is 50 J, how far does the block slide before stopping? Use the value g = 10 m/s^2. Group of answer choices A. 10 m B. 1 m C. 5 m D. 0.5m

Sara used a sling shot to hunt a bird. She stretched the rubber band 5cm when she applied 2 N force. How much elastic potential energy is stored in the sling shot ? A. 0.05 J B. 0.075 J C. 0.45 J D. 0.25 J

A 4.00kg block moves with an initial speed of3.50 km/h downhillover an inclined plane as shown in the figure. The height of the inclined plane is 51.3cm and the friction coefficient between the block and the incline is 0.120. a.How much is the speed of the block at the midpoint of the inclined side. b.How much is the speed of the block at the bottom of the inclined side.

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

10. Block 1 with a mass of 1.0 kg slides down a frictionless ramp with a height of 3.0 m and cllides with block 2 which has a mass of 2.0 kg. The flat surface has friction with a friction coefficient of 0.50. 2 a. Determine the speed of block 1 when it reaches the bottom of the ramp.

A 2.46 kg block moves along a frictionless surface with a speed of 7.83 m/s when it encounters a rough shallow hill, whose sides have a length of l=5.21 m. The hill is low enough so that the block can make it over the hill. Because the surface of the hill is rough (shown in orange in the figure), the block experiences a frictional force of 2.23 N while on the hill. a) What is the speed of the block after it traverses the hill?

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%

A 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 d.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.O 2J B.O4J C. 0 J D.O6J

E. 19.77 m/s 21.85 m/s C. 26.37 m/s F. 1--1 IYYVE On the roller-coaster shown, a car is moving 12 m/s toward the right at point 1. Assuming no friction, calculate the speed of the car at point 4. 3 40 m 26 m 4 15 m 21. A. 20.28 m/s D. 25.18 m/s 24.54 m/s B. 18.94 m/s E. F. C. 23.73 m/s 26.35 m/s 1--1 KTMDG A box slides from rest down a curved slope. Its initial height is 21 m above the ground, and it comes off the slope 7_m above the ground. How fast is the box moving as it leaves the slope? Assume friction is negligible. ^ Pigshow.jpeg Pig show.jpeg

A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s2. Match the answers with questions. the final kinetic energy of the box (Kf)                                                                                              the change in kinetic energy of the box (ΔK) A. 320 J B. 20 J C. -320 J D. -20 J E. 50 J F. -50 J G. 0 J