Fred (mass 60 kg) is running with the football at a speed of 6.0 m/s when he is met head-on by Brutus (mass 130 kg ), who is moving at 4.1 m/s. Brutus grabs Fred in a tight grip, and they fall to the ground. Part A Which way do they slide? in the direction Fred was running in the direction Brutus was running Submit Part B How far do they slide? The coefficient of kinetic friction between football uniforms and Astroturf is 0.30. Express your answer with the appropriate units. Request Answer Value Submit HA Units Request Answer ?

Phys 11

A boy pulls a bag of baseball bats across a ball field toward the parking lot. The bag of bats has a mass of 8.6 kg, and the boy exerts a horizontal force of 28 N on the bag. As a result, the bag accelerates from rest to a speed of 1.18 m/s in a distance of 5.15 m. Part A What is the coefficient of kinetic friction between the bag and the ground? Express your answer to three significant figures. ?

Problem 3 Consider a vane used to redirect a stream of water, as shown below. The thin water film has a thickness of 8 = 10 mm and goes deep into the page. Your goal is to determine the reaction force necessary to keep the vane stationary, as well as the instantaneous acceleration in the absence of a reaction force in the x-direction. The velocity of the jet is 20 m/s and 0 = 35°. Assume the system extends into the page 1 m, and the mass of liquid plus cart is 25 kg. 1. Sketch and annotate an appropriate control volume to calculate reaction forces. 2. Assuming Vyane = 0, calculate the rection forces necessary to keep the vane stationary. 3. Calculate the instantaneous acceleration of the control volume in the absence of a reaction force in the x-direction (Voane = 0). 4. Calculate the instantaneous acceleration at the moment the vane velocity is half the jet velocity. Vrane Vjet

Two toy cars are about to collide! B A Car A has a mass of 450 g and is travelling at 2.25 m s-1. Car B has a mass of 350 g and is travelling in the opposite direction at 2.75 ms-1. (Define left to be the positive x-direction.) Unless directed in this question, do not round your answers.

A 22-g bullet traveling 280 m/s penetrates a 1.8 kg block of wood and emerges going 120 m/s. Part A If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges? Express your answer to two significant figures and include the appropriate units. ? v3 = Value Units

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Can you please help me with this question?

0.180 kg stone rests on a frictionless, horizontal surface. A bullet of mass 6.00 g, traveling horizontally at 310 m/s, strikes the stone and rebounds horizontally at right angles to its original direction with a speed of 170 m/s. Express your answer in meters per second. V = m/s Submit Previous Answers Not completed before the time limit • Part B Compute the direction of the velocity of the stone after it is struck. Express your answer in degrees. from the initial direction of the bullet Submit Previous Answers Not completed before the time limit Part C Is the collision perfectly elastic? yes no MacBook Air 80 F3 esc 888 DD FI F2 F4 FS F6 F7 F9 F10 ! @ #3 % & 1 4 7 8 6. - Q W E R T Y U { tab S F G H J K L aps lock C V M control option command command option .. .-

Block X Block Y 10. Vx M Figure 1. Before the collision Block X Block Y VXY. M Figure 2. After the collision Block X slides along a horizontal surface with a speed Vx toward block Y that is initially at rest, as shown in Figure 1. After block X collides with block Y, the two blocks remain stuck together and travel at a velocity of VXY, as shown in Figure 2. Frictional forces are considered to be negligible. Which of the following claims is correct regarding the momentum of the system containing only block X and the system that contains block X and block Y? A The system containing block X is an open system, and the system of both blocks is an open system. The system containing block X is an open system, and the system of both blocks is a closed system. The system containing block X is a closed system, and the system of both blocks is an open system. D The system containing block X is a closed system, and the system of both blocks is a closed system.