Chapter 38, Problem 3MCQ

A man slides two boxes up a slope. The two boxes A and B have a mass of 75 kg and 50 kg, respectively. (a) Draw the free body diagram (FBD) of the two crates. (b) Determine the tension in the cable that the man must exert to cause imminent movement from rest of the two boxes. Static friction coefficient USA = 0.25 HSB = 0.35 Kinetic friction coefficient HkA = 0.20 HkB = 0.25 M₁ = 75 kg MB = 50 kg P 35° Figure 3 B 200

A golf ball is struck with a velocity of 20 m/s at point A as shown below (Figure 4). (a) Determine the distance "d" and the time of flight from A to B; (b) Determine the magnitude and the direction of the speed at which the ball strikes the ground at B. 10° V₁ = 20m/s 35º Figure 4 d B

The rectangular loop of wire shown in the figure (Figure 1) has a mass of 0.18 g per centimeter of length and is pivoted about side ab on a frictionless axis. The current in the wire is 8.5 A in the direction shown. Find the magnitude of the magnetic field parallel to the y-axis that will cause the loop to swing up until its plane makes an angle of 30.0 ∘ with the yz-plane. Find the direction of the magnetic field parallel to the y-axis that will cause the loop to swing up until its plane makes an angle of 30.0 ∘ with the yz-plane.