24. A skier of mass 70 kg is pulled up a slope by a motor-driven cable. How many horsepower output must a motor have to pull him 100 m up a 30° frictionless slope at a constant speed of 2 m/s? a.700 b. 0.94 c. 746 d. 1.06
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Q: A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at…
A: Given : m = 4 kg v = 5 m/s h = 8 m g = 10 m/s2
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Q: 30. John is riding an elevator. If John notes that the elevator travels upwards with a speed of 0.23…
A: mass (m)=75 kg acceleration due to gravity(g)=9.8 m/s2 speed(v)=0.23 m/s
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A: Given data: Force (F) = 334 N Displacement (d) = 50.0 m Power (P) = 3.71 kW Required: Time (t)
Q: A 75 kg skier starts with an initial speed of 2 m/s down a 40 m high ramp. They launch off a ramp…
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A: Force, F = - dU/dr U = potential energy Again F = m a M = mass of the particle a = it's acceleration
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- An advertisement claims that a(n) 1600 kg car can accelerate from rest to 26 m/s in 8.4 s. Given: Unit conversion: 746 W/hp. What average power must the motor pro- duce to cause this acceleration, if we ignore friction and air resistance? Answer in units of hp. Answer in units of hp. Your response... i PALETTE1.At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without friction, and descends through a vertical height of 2.31 m, what is her speed at the bottom of the slide?Draw and Explain.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 40 N horizontal force is applied to a 6.0 kg box. Friction is negligible. The box moves a horizontal distance of 4.0 meters. The work done by the 40 N force is A. 160 J B. 10 J C. 80 J D. 92 Jplease help.ACTIVITY 1 Problem Solving Power Rating Power is the rate of doing work. Power depends on the amount of work done in a specific time. It is measure in joules/second or watts which is the SI unit. Horsepower often used in measuring power of machines but is not an SI unit. One horsepower is equivalent to 750 watts. Read, analyze, and solve the following problems using the GUFSA template. Show your complete solution. Round off your final answer to the nearest hundredths. 1. A piano mover pushes a piano with a force of 200 N, moving it 12 m in 15 s. With how much power does the piano mover need to push?
- 26. A 2000 kg car with speed 12.0 m/s hits a tree. The tree does not move or break and the front of the car is smashed inward 50.0 cm. Ignore friction. (a) Determine the work done on the car by the tree. (b) Determine the amount of force involved.A 1250 kg sports car accelerates from zero to 30 m/s in 25 s. What is the average power delivered by the car engine? Select one: a. 25.5 kW b. 22.5 kW с. 12.5 kW Previc ormula Sheet, CA-2, T-3, AY Jump to... 20-21 Activ LENGO to7. Car 1 has half the mass of car 2, but they both have the same kinetic energy. If the speed of car 1 is v = 10.0 m/s, what is the speed of car 2?
- 6. Two blocks are connected by a very light string passing over a massless, frictionless pulley (see figure). Traveling at a constant speed, the 20.0-N block moves 65.0 cm to the right and the 12.0-N block moves 65.0 cm down. How much work is done a. on the 12.0-N block by gravity? b. on the 12.0-N block by the tension in the string? in total on the 12.0-N block? C. d. on the 20.0-N block by gravity? on the 20.0-N block by the tension in the string? on the 20.0-N block by the normal force? on the 20.0-N block by friction? in total on the 20.0-N block? e. f. g. h. 20.0 N 12.0 N1. A visibly distraught Granny has emerged from her car (it seems everyone has been ignoring her and talking about planets), and is trying to get back on the road. She puts a shoulder against the rear bumper of her car (m 1600 kg) and applies a constant force of 20.0 N for a full 20.0 seconds. The car does not budge. How much work has Granny done? -3. A 26.00-kg child initially at rest slides down a playground slide from a height of 3.20 m above the bottom of the slide. If her speed at the bottom is 2.80 m/s, how much energy is lost due to friction? J cci16 f16 cci16 ceil6 cci