MReview I Constants I I A car has a mass of 1500 kg. If the driver applies the brakes while on a gravel road, the maximum friction force that the tires can provide without skidding is about 7000 N. Part A If the car is moving at 26 m/s, what is the shortest distance in which the car can stop safely? Express your answer to two significant figures and include the appropriate units. HÁ Az = Value Units Submit Previous Answers Request Answer

MReview I Constants I I A car has a mass of 1500 kg. If the driver applies the brakes while on a gravel road, the maximum friction force that the tires can provide without skidding is about 7000 N. Part A If the car is moving at 26 m/s, what is the shortest distance in which the car can stop safely? Express your answer to two significant figures and include the appropriate units. HÁ Az = Value Units Submit Previous Answers Request Answer

Name: Review I Constants I PA car has a mass of 1500 kg. If the driver appl
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Description: Review I Constants I PA car has a mass of 1500 kg. If the driver appliesthe brakes while on a gravel road, the maximumfriction force that the tires can provide withoutskidding is about 7000 N.Part AIf the car is moving at 26 m/s, what is the shortes

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Energy Of A System

Section: Chapter Questions

Problem 7.4OQ: A cart is set rolling across a level table, at the same speed on every trial. If it runs into a...

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A cart is set rolling across a level table, at the same speed on every trial. If it runs into a patch of sand, the cart exerts on the sand an average horizontal force of 6 N and travels a distance of 6 cm through the sand as it comes to a stop. It instead the cart runs into a patch of gravel on which the can exerts an average horizontal force of 9 N, how far into the gravel will the cart roll before stopping? (a) 9 cm (b) 6 cm (c) 4 cm (d) 3 cm (e) none of those answers
(a) Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a).
A cart is set rolling across a level table, al the same speed on every trial. If it runs into a patch of sand, the cart exerts on the sand an average horizontal force of 6 N and travels a distance of 6 cm through the sand as it comes to a stop. If instead the cart runs into a patch of Hour, it rolls an average of 18 cm before stopping. What is the average magnitude of the horizontal force the cart exerts on the flour? (a) 2 N (b) 3 N (c) 6 N (d) 18 N (e) none of those answers
Review. A force platform is a tool used to analyze the performance of athletes by measuring the vertical force the athlete exerts on the ground as a function of time. Starting from rest, a 65.0-kg athlete jumps down onto the platform from a height of 0.600 m. While she is in contact with the platform during the time interval 0t 0.800 s, the force she exerts on it is described by the function F = 9 200t 11 500 t2 where F is in newtons and t is in seconds. (a) What impulse did the athlete receive from the platform? (b) With what speed did she reach the platform? (c) With what speed did she leave it? (d) To what height did she jump upon leaving the platform?
A Small pickup truck that has a caliper shell slowly coasts toward a red light with negligible friction. Two dogs in the back of the truck are moving and making various inelastic collisions with each other and the walls. What is the effect of the dogs on the motion of the center of mass of the system (truck plus entire load)? What is their effect on the motion of the truck?
a. Saif is going in his bike with an initial speed of 24.2 m/s and as he approaches a crane, the braking system abruptly brings the 223kg bike (rider mass included) to a speed of 4.3 m/s over a distance of 6.7m. Determine the braking force applied to his bike. b. A tow truck is experiencing 600 N tensional force in the cable and the cable makes a 60o angle with the horizontal, If the mass of the car is 2400 kg, calculate the acceleration with which it gets lifted? c. A Physics 1 student got confused by Newton’s laws and asks her teacher this question “Astronauts in outer orbit are weightless (or float) because there is no gravity there”. Is this true? If not, explain the mistake in this statement.
A vehicle with a mass of (2810.67)kg is being tested for its engine consumption by measuring the force it needs to move the vehicle upon covering a certain distance. If the coefficient of kinetic friction of the wheels is (0.58), the initial velocity upon the start of the measurement is (90.68)m/s and the distance set to measure the net force is (83.38)m, what is the final velocity of the vehicle? The net force is (4506)N.
A 800 kg car is traveling down a highway at 13.0 m/s when the driver notices a turtle in the middle of the road. Not wanting to strike the turtle, the driver applies her brakes, and her car skids to a stop in 18.0 m. To the nearest newton, what net force must act on the car? Hint: there are more than one way you could go about solving this problem.
During an Olympic 100-m sprint race, Usain Bolt, the world record holder in that race, quickly accelerates to his top speed of 12.4 m/s. Analysis of his technique has shown that each of his feet makes contact with the ground for 0.0800 s, exerting a force of magnitude 2.80 ✕ 103 N during this contact. This allows the 94.0 kg Bolt to leap forward and remain airborne for 0.120 s until the next foot touches the ground. (Ignore air resistance.) a) What are the magnitudes of the horizontal and vertical components of the force (in N) Bolt's feet exert on the ground? (Round your answers to at least three significant figures.) Horizontal = Vertical = b) Assuming that the sprinter accelerates at a constant rate while his feet are in contact with the ground and does not slow down when he is airborne, by what amount does Bolt's horizontal speed (in m/s) increase with each step? (Round your answer to at least three significant figures.) c) Assuming that the sprinter's speed increases at a…
A 4.0-g bullet leaves the muzzle of a rifle with a speed of 340 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.83-m-long barrel of the rifle? N
A block with a mass (m) of 74.7 kg slides along a horzontal surface. the coefficent of kinetic friction is .31. THe block has an ititial speed (v0) at 11.6m/s in the positive direction. 1) write and expression for the x component of the frictional force of the block experiences Ff in terms of the given variables and variables avaible. 2) what is the magnitude of the frictional force? 3) how for will the block travel before coming to rest.
A 150-g baseball is dropped from a tree 15.0 m above the ground. a.)With what speed would it hit the ground if air resistance could be ignored? Express your answer to three significant figures and include the appropriate units. b.)If it actually hits the ground with a speed of 8.00 m/s, what is the magnitude of the average force of air resistance exerted on it? Express your answer to three significant figures and include the appropriate units.