デジタル形式で段階的に解決 ありがとう!! SOLVE STEP BY STEP IN DIGITAL FORMAT An engine consumes 40.0 hp to propel a car along a level track at 15.0 m/s. What is the magnitude of the total retarding force acting on the car? ans 1.99 KN.

Component Method: With your calculator, determine the x and y components of F1 and F2. Remember that Fx = Fcos θ and Fy = F sin θ. Find the x and y components of the resultant from the sum of x and y components. Draw a right triangle with x and y components as sides, and the hypotenuse representing the resultant. Calculate the magnitude of the resultant from the square root of (Rx2 + Ry2). Calculate the direction of the resultant by using θ R = tan-1 (Ry/Rx).

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

Nahed weighs 55 kg, she uses her scooter of mass 5 kg to go to her nearby friend's house. Her speed upon arriving is 15 m/s.   a. Calculate the work done by the brakes to stop the scooter.   b. What is the magnitude of the breaking force, if the scooter comes to a rest after 3 m?

You push a file cabinet up a frictionless ramp tilted at 10°with horizontal. The file cabinet has a mass of 100 kg and you are pushing with a 700 N force in the direction up along the ramp. The file cabinet has initial speed of 2.0 m/s. It's moved 8.0 m up along the ramp. Match the answers with questions. 10.0° + the initial kinetic energy of the cabinet (Kj) A. O J + the final kinetic energy of the cabinet (Kf) В. 4208 J the change in kinetic energy of the cabinet (AK) С. 4408 J D. 4008 J Е. 200 J F. -200 J G. -4408 J H.-4008 J I. -4208 J

A net external force is applied to a 25-kg object that is initially moving at 1 m/s. The net force component along the displacement of the object varies with the magnitude of the displacement as shown in the drawing.   What is the final KE (in Joules) of the object at x=20m?   What is the speed (in m/s) of the object at x=20m?

Power of the Human Heart. The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood. Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to 1.5 m. The density (mass per unit volume) of blood is 1050 kg/m3 . What is the heart's power output. Use g = 9.8m/s2

A mother has four times the mass of her young son. Both are running with the same kinetic energy. ▼ Part A What is the ratio vs/vm other of their speeds? Us/Um = [ΠΙ ΑΣΦ ?

A 1400 kg car delivers a constant 42 hp to the drive wheels. We assume the car is traveling on a level road and that all frictional forces may be ignored.A) What is the acceleration of this car when its speed is 10 m/s?B) If the speed of the car is doubled, does its acceleration increase, decrease, or stay the same? Explain

A car requires 72.8 hp to maintain a constant speed of 21.3 m/s on a straight, flat road. Assuming other losses are negligible, determine the magnitude of the total resistive force FR acting on the car (due to friction, air resistance, etc.). Use this conversion as needed: 1 hp = 746 W. FR = × 10³ N