**38. A 4-kg toy jet sled is accelerated forward from rest by escaping CO2 from the jet engineAfter the sled has gone 10 m, the engine shuts off, leaving the sled going 10 m/s. The coefficientof friction between the sled and the snow is 0.2. How much force did the jet produce? How farwill the sled slide after the jet shuts off?

The frictional force exerted on the toy jet and the snow is,Substitute the values,

Answered: **38. A 4-kg toy jet sled is…

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter6: Momentum And Collisions

Section: Chapter Questions

Problem 68AP

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Review. A block of mass m = 2.00 kg is released from rest at h = 0.500 m above the surface of a table, at the top of a = 30.0 incline as shown in Figure P5.101. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine the acceleration of the block as it slides down the incline, (b) What is the velocity of the block as it leaves the incline? (c) How far from the table will the block hit the floor? (d) What time interval elapses between when the block is released and when it hits the floor? (e) Does the mass of the block affect any of the above calculations?
The driver of a speeding empty truck slams on the brakes and skids to a stop through a distance d. On a second trial, the truck carries a load that doubles its mass. What will now be the trucks skidding distance? (a) 4d (b) 2d (c) 2d (d) d (e) d/2
The average speed of a nitrogen molecule in air is about 6.70 102 m/s, and its mass is 4.68 1026 kg. (a) If it takes 3.00 1015 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in the opposite direction, what is the average acceleration of the molecule during this time interval? (b) What average force does the molecule exert on the wall?
In Figure OQ5.2, a locomotive has broken through the wall of a train station. During the collision, what can be said about the force exerted by the locomotive on the wall? (a) The force exerted by the locomotive on the wall was larger than the force the wall could exert on the locomotive. (b) The force exerted by the locomotive on the wall was the same in magnitude as the force exerted by the wall on the locomotive. (c) The force exerted by the locomotive on the wall was less than the force exerted by the wall on the locomotive. (d) The wall cannot be said to exert a force; after all, it broke. Figure OQ5.2
In the situation described in Problem 45 and Figure P4.45, the masses of the rope, spring balance, and pulley are negligible. Nicks feet are not touching the ground. (a) Assume Nick is momentarily at rest when he stops pulling down on the rope and passes the end of the rope to another child, of weight 440 N, who is standing on the ground next to him. The rope does not break. Describe the ensuing motion. (b) Instead, assume Nick is momentarily at rest when he ties the end of the rope to a strong hook projecting from the tree trunk. Explain why this action can make the rope break. Figure P4.45 Problems 45 and 46.
Two blocks are connected by a light string that passes over two frictionless pulleys as in Figure P5.24. The block of mass m2 is attached to a spring of force constant k and m1 m2. If the system is released from rest, and the spring is initially not stretched or compressed, find an expression for the maximum displacement d of m2. Figure P5.24
1. A 10-kg body falls from rest, with negligible interaction with its surroundings (no friction). Determine its velocity after it falls 5 m. Derive with the formula below, show the cancellation, explain the step by step and draw a free body diagram/figure. refer with this: PE1 + KE1 + U1 + WF1 + Q1 + W1 = PE2 + KE2 + U2 + WF2 + Q2 + W2 + E losses.
A 10 kg block with an initial velocity of 10 m/s slides 10 meters across a horizontal surface and comes to rest after sliding for 2 seconds. How much force was acting on the block to make it stop? Your answer should be in units of N but you should only submit the number for your answer (and don't worry about negative signs, just submit a positive value).
A hockey stick exerts an average force of39 N[S] on a 0.20 kg hockey puck over a displacement of 0.22 m. If the hockey puck started from rest, what is the final velocity of the puck? Assume that the friction between the puck and the ice is negligible.
When considering relative velocity, which of the following scenarios would result in a runner being added with more force when moving out of velocity of 6 m/s? Pick one answer A. 6 m/s tail windB. No windC. 3 m/s head windD. 4 m/s head wind E. 8 m/s tal wind F. C and DG. D and E
A lady pulls a cart with a force of 1800 N. Neglecting friction, if the cart changes from resting to a speed of 1.25 m/s in a distance of 0.2 m, what is the total mass of the cart? Show detailed solution. a. 715 kg c. 480 kgb. 460 kg d. 220 kg
A truck of mass 10 000 kg pulls a trailer of mass 6 000 kg along a level road. The truck and trailer accelerates at 0.75 m/s^2. Friction and air resistance act on both the truck and trailer. The total drag force is a constant 5 000 N, with a half of this force acting on the trailer. If the trailer lost connection with the truck, what will be the acceleration of the truck? * Use g=9.8 a. 1. 32 m/s2 b. 3.45 m/s2 c. 2. 54 m/s2 d. 4.16 m/s2 e. 1.45 m/s^2

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