Show Attempt HistoryCurrent Attempt in Progress× Incorrect.A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of thewagon, rider, and rock is 91.9 kg. The mass of the rock is 0.279 kg. Initially the wagon is rolling forward at a speed of 0.547 m/s. Thenthe person throws the rock with a speed of 16.3 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rockis thrown (a) directly forward in one case and (b) directly backward in another.(a) vi0.402(b) v = i0.505m/s.m/s

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College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Problem 2. Consider the system shown in Figure 1 with m,= 12.5 kg, m, = 20.0 kg. Object m, is resting on the floor, and object m, is 4.00 m above the floor when it is released from rest. The pulley axis is frictionless. The cord is light does not stretch, and does not slip on the pulley a. What is the magnitude %3D %3D the acceleration of the object. b. Calculate the time interval required for m, to hit the floor
As a science fair project, you want to launch an 950 g model rocket straight up and hit a horizontally moving target as it passes 40.0 m above the launch point. The rocket engine provides a constant thrust of 19.4 N. The target is approaching at a speed of 16.0 m/s At what horizontal distance between the target and the rocket should you launch? Express your answer with the appropriate units. _O Di μA Value Submit Units Request Answer ?
An aging coyote (m = 42.1 kg) cannot run fast enough to catch a roadrunner (m = 16.3 kg). He purchases a set of jet-powered roller skates, which proved a constant horizontal acceleration of 15.2 m/s2. The coyote starts at rest 73.2 m from the edge of a cliff at the instant the roadrunner zips past in the direction of the cliff. Hint: their initial positions at the top of the cliff are the same. a. Determine the minimum constant speed the roadrunner must have to reach the cliff before the coyote. b. At the edge of the cliff, the roadrunner escapes by making a sudden turn, while the coyote continues straight ahead. The coyote’s skates remain horizontal and continue to operate while he is in flight, so his acceleration while he is in the air is (15.2i – 9.80j) m/s2. The cliff is 127 m above the flat floor of the desert. Determine how far from the base of the vertical cliff the coyote lands. c. Determine the components of the coyote’s impulse upon impact.
Akash and Beth are on skateboards. Beth and her skateboard have a combined mass of 62 kg. Akash and his skateboard have a combined mass of 150 kg. Beth pushes Akash to the left with a force of 120N. Assume no friction. What are the accelerations of Beth (+ skateboard) and Akash (+ skateboard)?
A 670 N student stands in the middle of a frozen pond having a radius of 6.9 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 2.9 kg physics textbook horizontally toward the north shore at a speed of 6.9 m/s. The acceleration of gravity is 9.81 m/s². How long does it take him to reach the south shore? Answer in units of s.
Spaceman Spiff needs to turn his 700 kg rocket and go in the opposite direction to escape the Zoks. He begins by is traveling through space at 3710 m/s when he reverses his course, going in the opposite direction with a speed of 5781 m/s. If his rocket thrusters push his craft with 87000 N of force, how long must he fire his rockets to make the change? 17 s
A particle with mass 0.9 kg is pulled vertical upwards from rest by means of a cord with an acceleration of 3.4 m/s2 for 4 seconds before the cord breaks. What is the acceleration of the particle the moment just after the cord broke? Give the magnitude and choose the unit and direction.
At launch a rocket has a mass of 3.66×104 kg, and the thrust of the engines is 5.34×105 N. If the rocket is launched straight upwards from the surface of Earth, what is the initial acceleration of the rocket? Take upwards to be the positive direction. Express your answer in m/s2 to 3 significant figures. Use g=9.81 m/s2.
The two masses in the figure are released from rest. After the 5.0 kg mass has fallen 1.5 m, it is moving with a speed of 4.5 m/s. What is coefficient of friction between the table and the 2.0 kg 1. mass? 2.0 kg 5.0 kg
A 0.300 kg yo-yo hangs at the end of a 0.25 m long string. The yo-yo and string are whirled around such that they are rotating in a vertical plane. The velocity of the yo-yo at the top of the path is 4.00 m/s. What is the tension in the string at that top of the path?
A car is accelerating with constant acceleration A. Block of mass mị is moving to the right as block of mass mą is moving to the left relative to the car as shown in the Figure. Find the acceleration of block of m1 relative to the car. The coefficients of kinetic friction between the blocks and block of mass m2 and the car are the same and given by µ (The pulley is massless and g is the gravitational acceleration.). A m, m2
Two blocks with masses m1 = 15.0 kg and m2= 10.0 kg are connected by a massless string across a massless, frictionless pulley as shown in the figure below. Block 1 sits on a frictionless plane inclined at an angle θ = 30.0° above the horizontal. When both blocks are released, block 1 begins sliding up the plane as block 2 falls. What is the acceleration of both blocks after they have been released?

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