A block of ice with mass 3.00 kg slides 2.00 m down an inclined plane that slopes downward at an angle of 30° below the horizontal. If the block of ice starts from rest, what is its final speed? You can ignore friction. 5.83 m/s 6.30 m/s 4.43 m/s O 3.13 m/s 10.00 m/s

A 2-kg block travels from the top of a plane inclined 25° with the horizontal compressing a spring at the bottom of the incline with an initial speed of 0.65 m/s. Due to the motion of the block, the spring was compressed by 0.2 meters. The spring has a k of 100 N/m and the coefficient of friction between the block and the incline is 0.40. What is the initial kinetic energy of the block? O -0.8) O 041 O -0.4)

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

A skater (at rest)starts at top of a ramp at a height of 4m and moves to the bottom of the ramp which is ground level. if there is no friction between the skateboard an ramp, what is the final speed of the skater? Weight of skater is 490 N

A ball is released at a height of h=2.70 m on a frictionless 30.0o slope. At the bottom, it turns smoothly (without loss of speed) onto a 60.0o slope going back up. What maximum height does it reach on the right side?

A 1350-kg car is traveling with an initial speed of 25.0 m/s. Determine the car's speed after -2.20 × 10° J of net work is done on the car. X m/s

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2 W S X In a hydroelectric dam, water falls 35 m and then spins a turbine to generate electricity. 3 E D 80 C $ 4 R 888 F V 96 5 T G ^ 6 B ▾ Part A What is AU of 1.0 kg of water? Express your answer with the appropriate units. View Available Hint(s) AU= -340 J Y Submit ▾ Part B ✓ Correct SOLVE: The change in the potential energy of 1.0 kg of water in falling 35 m m is H Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 48 MW of electricity? This is a typical value for a small hydroelectric dam. Express your answer in kilograms per second. ▸ View Available Hint(s) m 11s AU, -mgh=-(1.0 kg) (9.8 m/s²) (35 m) = -340 J = = Provide Feedback Submit MacBook Air Previous Answers & 7 N IG] ΑΣΦ | 3-4 U * 8 D-H I M @ JK ( 9 MOSISO DD O I भ ? O L kg/s command F10 P > ; C option + ? T I Next > delete re

Maria sets up a simple track for her toy block  (m = 0.30 kg)  as shown in the figure below. She holds the block at the top of the track, 0.54 m above the bottom, and releases it from rest.   (a) Neglecting friction, what is the speed of the block when it reaches the bottom of the curve (the beginning of the horizontal section of track)? m/s(b) If friction is present on the horizontal section of track and the block comes to a stop after traveling 0.80 m along the bottom, what is the magnitude of the friction force acting on the block? N

A roller coaster of mass 800 kg is moving with a speed of 20.0 m/s at position A. At position C, the speed of the roller coaster is 27.0 m/s. How much work was done by friction between points A and C? a. −182 kJ b. 0 c. + 445 KJ d. +1276 KJ