(a) A winch raises an object of mass 20 kg from rest with an accelerationof 0.2ms 2. How much work is done by the winch in the first 12seconds?(b) Find the work done by a force F = (5i + 3j) N whose point ofapplication undergoes a displacement s = (3i + 7j) m.(c) A force F = (2i – j+3k) N acts on a particle which moves from pointA with position vector (-2i + j- 3k) m to a point B with positionvector (5i - j+ 3k) m. Find the work done by the force.

We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Answered: A winch raises an object of mass 20 kg…

Similar questions

Discuss the motion of the bead according to the equation of motionq¨2 − ω2sin2α q = −g cos αas completely as you can. Find explicit solutions. What will happen if the beadis slightly displaced from the point where it has no acceleration.
After being pushed (no matter what force) an object with mass 100 kg covers a distance of 15 m before stops because a frictional force of 20 N, what is the work done by that force? Caution: consider the friction acting in opposite direction of motion. Hint: Work consider all the acting forces.
To compress a spring 5.0 cm from its unstretched length, 18.0 J of work must be done. (a) What is the magnitude of the force needed to stretch it to 7.5 cm? (b) How much work must be done in stretching this spring 7.5 cm from its unstretched length?
While riding on an elevator, a person has twoforces acting on him, a normal force and a gravity force. Suppose the person has mass m is on an elevator that 1 descends a distance d. If the total work on the person is Wiotal = -mgd, what is 4 the magnitude of the normal force? Is the elevator speeding up or slowing down? The knowns in this problem are m and g.
A man pushes a lawn mower on a level lawn with a force of 185 N. If 48% of the force is directed horizontally, how much work is done by the man in pushing the mower 5.9 m?
A 2 kg crate sitting on a horizontal surface is pushed by a horizontally applied force of 8N. If it starts from rest, how much work is done in the first 6 seconds?
the kinetic energy of a car is 7 x 10^6 J AS IT TRAVELS along a horizontal road. How much work is required to stop the car in 15s?
A 10 kg barbell is rolling down a hill. There is no friction or air resistance acting on it, only the force of gravity. If it starts out moving 2 ms1, and ends up moving 7 ms1, then how much work does gravity do on it?
A 2.2 kg object is initially moving at 5.78 m/s. After a time of 4.9 s, the object is moving at a rate of 8.72 m/s. What net work was done on the object during that time?
An applied force of 20 N i pushes an object that is initially at rest over a horizontal surface. The coefficient of kinetic friction is 0.450 and the mass is 1.4 kg. If the net work done at some point is 60.6 J, what is the object's speed at that point?
A mover is lowering a crate which has a mass of 37.6 kg at a constant speed of 4.65 m/s. How much work (include the appropriate sign) does the tension in the cable do as the crate is lowered a distance of 22.7 m?
A sled of 150 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. (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?

SEE MORE QUESTIONS

A winch raises an object of mass 20 kg from rest with an acceleration of 0.2ms 2. How much work is done by the winch in the first 12 seconds?