College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- 4.) A 2.27 kg sack of flour is lifted vertically at a constant speed of 4 m/s through a height of 12 m. A.) How great a force is required to lift the sack? B.) How much work is done on the sack by lifting the force?arrow_forwardNeeds Complete typed solution with 100 % accuracy.arrow_forwardmled. If the child walks 15 m up the hill, how large of a force must the child exert? 3. How much work is done on a small car if a 3150 N force is exerted to move it 75.5 m to the side of the road? 4. A crate is being lifted into a truck. If it is moved with a 2470 N force and 3650 J of work is done, then how far in the crate being lifted? 5, If 16,700 J of work is done to shoot the human cannonball down a 3.05 m barrel, then how much force is applied to the person to fire them out the cannon? Cleenearrow_forward
- A particle of mass 1.0 kg moves from A to B in response to two forces. One force does work of +100 J on the particle in this interval. The second force does work equal to -40 J in the same interval. If the particle started from A with a speed of 10.0 m/s, what will its speed at B? O A. 5 m/s OB. 15 m/s O C. 8 m/s O D. 11 m/sarrow_forwardHi please help with the following: As shown in the figure below, a 50-N sled is pushed up a frictionless inclined plane (theta =30 degrees) by a force of F = 75N applied parallel to the ground. The sled is moved along the plane for 10.0 m. a. Find the work done by the normal forcearrow_forwardA crate with a mass of 37.0 kg is pushed with a horizontal force of 150 N. The crate moves at a constant speed across a level, rough surface a distance of 5.95 m What is the work done (in J) by the 150 N force? J=? What is the coefficient of kinetic friction between the crate and the surface?arrow_forward
- A sled of 50 kg mass moves along a smooth horizontal surface at 7 m/s. The sled encounters a rough spot that exerts a force of -90 Nt on the sled. Calculate: a) What is the acceleration of the sled? b) Calculate how much work is done by the frictional force on the sled if the patch is 15 m in length. c) What is the sled's final velocity as it leaves the rough spot?arrow_forwardtwo people each exert a force of 300N pulling a car by seperate ropes in the east direction. the first person pulls at an angle of 20.0 degrees N of E and the second person pulls at angle of 20.0 degrees S of E calculate the work done on the car by each worker if the car moves 0.50m/s for 5.6sarrow_forward3. A body moves from point A to point B under the action of a force varying in magnitude as shown in figure, then the work done is? 20 15+ 10+ 5+ 0 -5 -10+ -15- N w R 5 8 8arrow_forward
- 3. A student drags a 3 kg box 5 m across a rough floor with a force of 40 N. A frictional force of 10 N resists the motion of the box. A) Calculate the work done by the student. B) Calculate the work done by friction. C) Determine the net work done on the box. D) If the box started from rest, how fast is it going at it approaches 5 m? has a yelocity of 8arrow_forwardHow much work (in J) must be done to lift a stack of bricks, which has a mass of 50 kg, from the ground to a height of 6 m? (g = 10 m/s?) A. 300J B. 500 J C. 3,000) D. 5,000J E. zero Jarrow_forwardCan i get help with this questionarrow_forward
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