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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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
Transcribed Image Text:You push a crate up a ramp at a constant velocity. Which force does the greatest magnitude of
work on the crate? a) the force of gravity, b) the force of friction, c) the normal force, d) the
force of you pushing, e) the net force or f) no force does work since the velocity is constant.
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- Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. The work done on object A is 500 J. After the force has pulled each object, object A moves twice as fast as object B. How much work is done on object B? What is the kinetic energy of object A after being pulled? What is the kinetic energy of object B after being pulled? What is the ratio of the mass of object A to the mass of object B?arrow_forwardA force of 100N acts on a block at an angle of 53° with respect to the horizontal, as shown. As the block moves through a displacement of 4 m to the left, the work done on the block by the force is A) +320 Nm B) +240 Nm F C) zero Ax D) -240 Nm E) -3200 Nm O A O D O Earrow_forwardYou stand at the top of a cliff and lower a first aid kit (attached to a rope) down the cliff to an injured hiker at a constant speed. What can you say about the work done by the rope and the work done by gravity on the kit as it is lowered? O The work done by the rope is positive and the work done by gravity is positive. The work done by the rope is negative and the work done by gravity is negative. O The work done by the rope is positive and the work done by gravity is negative. O The work done by the rope is zero and the work done by gravity is zero. O The work done by the rope is negative and the work done by gravity is positive.arrow_forward
- A concrete block is pulled 7.0 m across a frictionless surface by means of a rope. The tension in the rope is 40 N; and the net work done on the block is 247 J. What angle does the rope make with the horizontal? A) A) 28° В) в) 41° c) C) 47° D) D) 62°arrow_forwardWhich of the following statements are true? Select all correct. Question 3 options: If an object speeds up, then the total work done on the object was positive. If an object moves at a constant speed, then the work done by each individual force is zero A force must be parallel to the displacement to do any work. If a force is perpendicular to displacement, it does zero work. If a force has a component in the opposite direction of the displacement, it does positive work. If an object doesn't move, then the work done by every individual force must be zero.arrow_forwardAn object with a mass of 15kg slides down an incline with a length of 6.0m at an angle of 28 degrees from horizontal. The coefficient of friction between the object and incline is 0.25 a) How much work does the gravitational force perform on the object? b) How much work does the frictional force perform on the object? c) What will its speed be as it reaches the bottom of the incline?arrow_forward
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