+1-415-670-9189
info@expertsmind.com
Find the work done by the cords force on the block
Course:- Physics
Reference No.:- EM13795692




Assignment Help
Assignment Help >> Physics

1) A cord is used to vertically lower an initially stationary block of mass M = 8.0 kg at a constant downward acceleration of g/2. When the block has fallen a distance d = 4.6 m, find (a) the work done by the cord's force on the block, (b) the work done by the gravitational force on the block, (c) the kinetic energy of the block, and (d) the speed of the block. (Note : Take the downward direction positive)

2) The only force acting on a 3.7 kg body as it moves along the positive x axis has an x component Fx = -3x N, where x is in meters. The velocity of the body at x = 2.6 m is 8.9 m/s. (a) What is the velocity of the body at x = 3.8 m? (b) At what positive value of x will the body have a velocity of 3.4 m/s?

3) A single force acts on a 2.6 kg particle-like object in such a way that the position of the object as a function of time is given by x = 4.3t - 2.3t2 + 3.4t3, with x in meters and t in seconds. Find the work done on the object by the force from t = 0 to t = 9.0 s.




Put your comment
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Physics) Materials
Assume a spaceship heading directly away from Earth at 0.610c can shoot a canister at 0.460c relative to the ship. Obtain the velocity of the canister relative to the Earth
In an isometric exercise a person places a hand on a scale and pushes vertically downward, keeping the forearm horizontal. This is possible because the triceps muscle applies
1. A video game console requires 6.00 V to operate correctly. A transformer allows the device to be powered from 120 V outlet. If the primary has 500 turns, determine how ma
A clock face has negative point charges -q, -2q, -3q, · · · , -12q fixed at the positions of the corresponding numerals. The clock hands do not perturb the net field due to
A person on a swing moves so that the chain is horizontal at the turning points. Show that the centripetal acceleration of the person at the low point of the arc is exactly
A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface
The Earth produces an inwardly directed electric field of magnitude 150 V/m near its surface. (a) What is the potential of the Earth's surface relative to V = 0 at r = ∞? (b)
Use the formula P = -(∂U/∂V) s,n,to show that the pressure of a photon gas is 1/3 times the energy density (UIV). Compute the pressure exerted by the radiation inside a kil