PW-3 An elevator motor is capable of lifting a 2,500kg elevator 50.0m with a constant speed in 12.0 seconds. a) Apply Fer ma to find the force needed to lift the elevator. b) Find the power of the elevator motor in watts and in horsepower. (1H.P.=750W) c) If the power of the elevator motor is 200H.P., find the constant speed at which the 2,500kg elevator can be raised. d) If the power of the elevator motor is 200H.P., find the constant speed at which the elevator can be raised if the elevator and its contents have a mass of 4,000kg

The magnitude of the force is 5.2 N and the magnitude of the displacement is 8 m as shown. What is the work done, in Joule?  Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

PW-3 An elevator motor is capable of lifting a 2,500kg elevator 50.0m with a constant speed in 12.0 seconds. a) Apply Fnet-ma to find the force needed to lift the elevator. b) Find the power of the elevator motor in watts and in horsepower. (1H.P.=750W) c) If the power of the elevator motor is 200H.P., find the constant speed at which the 2,500kg elevator can be raised. d) If the power of the elevator motor is 200H.P., find the constant speed at which the elevator can be raised if the elevator and its contents have a mass of 4,000kg 梦 0 (87) bp

1.  Which of the following is not an equation for getting work? Select one: a. W=Fd b. W=Fdcosθ c. W=N⋅m d. all of these

For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.00 m at a constant speed in a time of 1.60 s. d.) What is the output power, in kW (kiloWatts)?  e.) What is the metabolic power, in kW (kiloWatts)?  f.) How long does it take to burn off the energy in a slice of apple pie, which energy content is 1680 kJ (400 food calorie), in minutes?

en 11 A 210.0 lb hiker is able to ascend a 1,100.0 ft high slope in 30 minutes. What was the average power output in hp? et red d out of

B3

11.) A 65.0-kg file cabinet of is sliding down a rough ramp for a distance of 5.00 m as shown. The friction force on the box is 75.0 N. During this process, what is the work done on the cabinet by the normal force, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

9.) A 65.0-kg file cabinet of is sliding down a rough ramp for a distance of 5.00 m as shown. The friction force on the box is 75.0 N. During this process, what is the work done on the cabinet by the friction force, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

A 1000 kg package is pulled up a 30o  incline at a constant speed of 4 m/s by means of a motor-driven cable. Find the power  expended by the motor to achieve this task and maintain this constant speed. A.) 50,000 W B.) 19,600 W C.) 40,000 W D.) 98,000 W