College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A stockroom worker pushes a box with mass 11.6 kg on a horizontal surface with a constant speed of 3.40 m/s. The coefficient of kinetic Part A friction between the box and the surface is 0.21. What horizontal force must the worker apply to maintain the motion? Express your answer with the appropriate units. HA ? F = Value Units Submit Request Answerarrow_forwardIn the rollercoaster shown in the figure, the height of the first hill is 24.5 meters, and the height of the second hill is 12.8 meters. The track of the rollercoaster is frictionless. If the rollercoaster car’s velocity is 20.4 m/s, what was its velocity at the top of the first hill? v = m/sarrow_forwardA cyclist coasts up a 10.0 degree slope, traveling 20.0 m along the road to the top of the hill. If the cyclist’s ini- tial speed is 9.00 m/s, what is the final speed? Ignore friction and air resistancearrow_forward
- A ball with mass 0.75 kg is thrown upward with initial velocity 25 m/s from the roof of a building 20 m high. Assume there is a force due to |v| air resistance of magnitude directed opposite to the velocity, where 30 the velocity v is measured in m/s. NOTE: Use g=9.8 m/s² as the acceleration due to gravity. Round your answers to 2 decimal places. a) Find the maximum height above the ground that the ball reaches. Height: 51.89 m Time: 5.81 X b) Find the time that the ball hits the ground. seconds X c) Use a graphing utility to plot the graphs of velocity and position versus time. Editarrow_forwardV:15)arrow_forwardA physics student, in a stationary elevator, places a 240.0 g mass on an electronic balance. The student hits the elevator button and it begins to move upwards. While the elevator is moving, the student records this information Time = 0 to 3.0 sec the balance reads 278 grams Time = 3.0 - 12 sec the balance reads 240. grams Time = 12.0 to 15.0 sec the balance reads 192 gram How far up (in meters) did the elevator travel? Consider: UP to be (+), DOWN to be (-) and g =9.8 m/s2 . ROUND YOUR ANSWER TO A WHOLE NUMBER of meters (no decimal places) HINT: This problem requires finding THREE different displacements and adding them up! 2nd HINT: You will need to (A) use your equations of motion or (B) make a v-t graph to find those displacements!arrow_forward
- Jennifer is walking at 1.22 m/s. If Jennifer weighs 552 N, what is the magnitude of hermomentum?A) 97.0 kg m/sB) 137 kg m/sC) 68.6 kg m/sD) 672 kg m/sE) 951 kg m/sarrow_forwardAnswer to 5)1.96arrow_forwardYou want the final speed at the bottom of your roller coaster hill to be 25 m/s. What is the height (h) of the hill to achieve this? Use g = 9.8 m/s2arrow_forward
- For a short period of time, the frictional driving force acting on the wheels of the 2.3-Mg van is FD = (600+2) N, where t is in seconds. (Figure 1) Figure FD 1 of 1 Part A If the van has a speed of 22 km/h when t= 0, determine its speed when t = 5 s. Express your answer to three significant figures and include the appropriate units. CHμA V = 3.32 Submit m Provide Feedback S ? Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remainingarrow_forwardIMPORTANT Midterm Information X Testing Services - Ivy Tech Comm X Pearson MyLab and Mastering X Course Home ✰ openvellum.ecollege.com/course.html?courseld=17389524&OpenVellumHMAC=54633187f9c9db171ca1674e2a385281#10001 + < Return to Assignment 10 of 10 Constants ☐ X Update:arrow_forwardPlease asaparrow_forward
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