(26) A 6.0 kg object is brought to the Moon, where the acceleration due to gravity is only one sixth of that on the Earth. a) The mass of the object on the Moon is (1) zero, (2) 1.0 kg, (3) 6.0 kg or (4) 36kg. Why? b) What is the weight of the object on the Moon?

(41) The mass of the object is 10kg and the force on the object is 60N at an angle of 60 degrees. What is the normal force and the acceleration?

(44) A 2.5 kg bullet traveling at 350 m/s hits a tree and slows down uniformly to stop while penetrating a distance of 12cm into the tree's trunk. What was the force exerted on the bullet in bringing it to rest?

(43) A constant net force of 75N acts on an object initially at rest through a parallel distance of 0.60m. a) What is the final kinetic energy of the object? B) If the object has a mass of 0.20kg, what is its final speed?

(71) When a certain rubber ball is dropped from a height of 1.25m onto a hard surface, it loses 18.0% of its mechanical energy on each bounce. A) How high will the ball bounce on the first bounce? B) How high will it bounce on the second bounce? C) With what speed would the ball have to be thrown downward to make it reach its original height on the first bounce?

(77) A 28-kg child slides down a playground slide from a height of 3.0m above the bottom is 2.5 m/s, what is the work done by non-conservative forces?

Solution Summary

The solution provides detailed solution to the questions related to work done by force and conservation of energy.

A 75.0 kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 4.60 m. What is the workdone on the man by a) the gravitational force and b) the escalator?

A person removes a 10.5 kg stereo amplifier from a shelf that is 1.82 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the workdone by
(a) the person
(b) the gravitational force that acts on the amplifier

A 1.00 * 10^2 kg crate is being pulled across a horizontal floor by a force P that makes an angle of 30 degrees above the horizontal. The coefficient of kinetic friction is 0.200. What should be the magnitude of P, so that the net workdone by it and the kinetic frictional force is zero?

A 48 kg box is being pushed a distance of 7.0 m across the floor by a force P whose magnitude is 143 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the workdone on the box by each of the four forces that act on the box. Be sure to include the proper plus or minu

Let F be the radial force field F= xi + yj. Find the workdone by this force along the following two curves, both which go from (0, 0) to (5, 25).
If C is the parabola...
If C is the straight line segment...
See attached file for full problem description.

Matthew pulls his little sister Sarah in a sled on an icy surface (assuming no friction), with a force of 60.0 N at an angle of 37.0 degrees above the horizontal. If he pulls her a distance of 12.0 m, what is the workdone by Matthew?

A force of 5 Newtons acts in the direction of a = -7i+3j+4k, moving a particle from point B(1, 7, 1) to point C(-7, 5,-2). What is the workdone on the particle given that the displacement is measured in meters?

An applied force of 6 Newtons acts in the direction of motion of a block of mass 9 Kg, with the mass being pulled across the floor against a frictional force of .6 Newtons. Assume that the block moved the distance 'y' in this process.
* What is the net force on the object?
* How much work does the net force do on the object