Physics Q&A

Question Two small identical smooth blocks A and B are free to slide on a frozen lake. They are joined together by a light elastic rope of length 2L which has the property that it stretches very little when the rope becomes taut. At time t=0,A is at rest at x=y=0 and B is at x=L,y=0 moving in the positive y-direction with speed V. Determine the…

Question Acceleration and tension in e pendulum string – DEPENDENT MULTI-PART PROBLEM – ASSIGN ALL PARTS A pendulum is 0.800 m long. und the bob has a mass of 2.40 kg. When the string makes an angle of θ=16.4∗ with the vertical, the bob is moving at 130 m/s. Problem 05.055 – 1- Tangential acceleration Find the magnitude of the tangential acceleration…

Question In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.40 m/s relative to the ground. A teammate passes the ball to him. The ball has a speed of 13.9 m/s and is moving in a direction of 31.8∘ east of north, relative to the ground. What is the magnitude of the…

Question For a one-dimensional system with the Hamiltonian H=2p2​−2q21​, show that there is a constant of the motion D=2pq​−Ht (b) As a generalization of part (a), for motion in a plane with the Hamiltonian H=∣p∣n−ar−n,  21. (a) For a one-dimensional system with the Hamiltonian H=2p2​−2q21​ show that there is a constant of the motion D=2pq​−Ht (b) As a generalization of part (a), for…

Question You fire a ball with an initial speed vo at an angle o above the surface of an incline, which is itself inclined at an angle 0 above the horizontal (Figure 1). (a) Find the distance, measured along the incline, from the launch point to the point when the ball strikes the…

Question In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.10 m/s relative to the ground. A teammate passes the ball to him. The ball has a speed of 14.0 m/s and is moving in a direction of 33.4∘ east of north, relative to the ground. What is the magnitude of the…

Question Consider the following circuit: a) What is the total resistance for the circuit? (Hint: try drawing an equivalent circuit) b) What is the current through the top 10Ω resistor? c) What is the current through the 20Ω resistor? d) What is the potential difference between points a and b ? Answer Step 1 First, draw the equivalent circuit. Explanation: B…