A 45.0-kg girl is standing on a 167-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.30 m/s to the right relative to the plank. (Let the direction the girl is moving in be positive. Indicate the direction with the sign of your answer.) (a) What is her velocity relative to the surface of ice? 0.782 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s (b) What is the velocity of the plank relative to the surface of ice? -0.518 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s

A 45.0-kg girl is standing on a 167-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.30 m/s to the right relative to the plank. (Let the direction the girl is moving in be positive. Indicate the direction with the sign of your answer.) (a) What is her velocity relative to the surface of ice? 0.782 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s (b) What is the velocity of the plank relative to the surface of ice? -0.518 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s

Name: A 45.0-kg girl is standing on a 167-kg plank. Theplank, originally at
Uploaded: 2024-03-20T06:57:37.000Z
Channel: Bartleby
Description: A 45.0-kg girl is standing on a 167-kg plank. Theplank, originally at rest, is free to slide on a frozenlake, which is a flat, frictionless surface. The girlbegins to walk along the plank at a constant velocityof 1.30 m/s to the right relative to th

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 97AP: A 100-kg astronaut finds himself separated from his spaceship by 10 m and moving away from the...

See similar textbooks

Similar questions

a .333 kg ball, initally at rest moves a distane of 5.0 m in 1.25 s. what is the magnitude of the average net force of the ball?
After falling from rest from a height of 30.0 m, a 0.500-kgball rebounds upward, reaching a height of 20.0 m. If the contactbetween ball and ground lasted 2.00 ms, what average forcewas exerted on the ball?
A decorative light fixture in an elevator includes a 1.7 kg light suspended by acable from the ceiling of the elevator. At the bottom of this light, a second cablesuspends another 0.40 kg light. The elevator is moving downward at 3.6 m/s whensomeone presses the emergency stop button. During the stop, the upper cablesnaps. The elevator engineer says that the cable could withstand a force of 40 Nwithout breaking. How long does it take for the elevator to stop?
A 1500 kg rocket is tobe launched with an initial upwardspeed of 50.0 m/s. In order to assistits engines, the engineers will startit from rest on a ramp that rises 53°above the horizontal (Fig.).At the bottom, the ramp turnsupward and launches the rocketvertically. The engines provide aconstant forward thrust of 2000 N,and friction with the ramp surfaceis a constant 500 N. How far fromthe base of the ramp should therocket start, as measured along the surface of the ramp?
Mass Ma lies on top of mass Mp, as shown. Assume M, > Mạ. The two blocks are pulled from rest by a massless rope passing over a pulley. The pulley is accelerated at rate A. Block M, slides on the table without friction, but there is a constant friction force f between Ma and M, due to their relative motion. Find the tension in the rope.
A 75 kg skydiver jumps out of an airplane. What is her termianl velocity in miles per hour (mph), assuming that k=10(kg/s) for free-fall(no parachute)? terminal velocity = ? mph
A young girl is riding a bicycle that has a total mass (including the kid) of 21.2 kg. The girl is moving at 5.99 m/s on a flat road when suddenly she slams on the brakes and skids to a stop in 8.22 meters. What was the magnitutde of the average force due to friction acting on the bicycle? Remeber, the magnitude of a force is always positive. Assume a constant friction force measured in Newtons and 3 significant digits in your answer.
A 68.5 kg skater moving initially at 2.40 m/s on rough horizontalice comes to rest uniformly in 3.52 s due to friction from the ice.What force does friction exert on the skater?
A 63 kg astronaut drifting with 7.0 m/s to the right with respect to a spacecraft uses a jetpack to slow down. If ittakes 14.0 s to come to a stop with respect to thespacecraft, what is the force exerted by the jetpack?
An object of mass 10 kg is roleased from rest 4000 m above the ground and allowed to fall under the influence of gravity Assuming the force duo to air resistance is proportional to tho velocity of the object with proportionality constant b 50 N.sec/m, determine the equation of motion of the object When will the object striko the ground? Assume that the accoloration due to gravity is 9.81 m/sec and let x(t) represent the distance the objoct has fallon in 1 seconds Delermine the oquation of motion of the object
The same rocket sled drawn is deceleratedat a rate of 196 m/s2. What force is necessary to producethis deceleration? Assume that the rockets are off. The massof the system is 2100 kg.
What force does a trampoline have to apply to a 45.0-kggymnast to accelerate her straight up at 7.50 m/s2? Notethat the answer is independent of the velocity of thegymnast—she can be moving either up or down, or bestationary