A force F = (1.70 N) i + (5.70 N)j+(7.80 N) k acts on a 5.50 kg mobile object that moves from an initial position of d = (7.50 m) i+(9.10 m)j+ (8.80 m) k to a final position of d f = (4.90 m) î + (6.00 m)j + (9.40 m) k in 2.90 s. Find (a) the work done on the %3D %3D %3D object by the force in the 2.90 s interval, (b) the average power due to the force during that interval, and (c) the angle between vectors d, and d .

The only force acting on a 3.6 kg body as it moves along the positive x axis has an x component Fx = - 5x N, where x is in meters. The velocity of the body at x = 1.8 m is 9.0 m/s. (a) What is the velocity of the body at x = 4.1 m? (b) At what positive value of x will the body have a velocity of 2.5 m/s?

A robot drops a 1.2kg package from the roof of a building 12.4m tall.  Ignoring wind resistance, with what force does the package hit the ground? A second robot drops a Nerf ball off the same roof, 12.4 m tall.  The Nerf ball has a mass of 0.001kg. Which one (package or Nerf ball) hits the ground sooner?

A force É = (5.90 N )î + (5.40 N )f + (6.40 N )k acts on a 1.20 kg mobile object that moves from an initial position of (4.20 m )î + (2.10 m )ŷ + (7.40 m )k to a final position of á f = (5.90 m )î + (8.20 m )ŷ + (5.50 m )k in 5.70 s. i Find (a) the work done on the object by the force in the 5.70s interval, (b) the average power due to the force during that interval, and (c) the angle between vectors d ; and d f. i (a) Number i Units (b) Number i Units (c) Number i Units

A horizontal force of 80.0 N is applied to a 5.00 kg block as the block slides a distance of 0.800 m along a horizontal floor. The coefficient of kinetic friction between the floor and the block is 0.500. If the block is initially at rest, how fast is it moving at the end of the displacement?

A trap-jaw ant snaps its mandibles shut at very high speed, a good trait for catching small prey. But an ant can also slam its mandibles into the ground; the resulting force can launch the ant into the air for a quick escape. A 12 mg ant hits the ground with an average force of 47 mN for a time of 0.10 ms; these are all typical values. At what speed does it leave the ground? Answer out to 3 decimal places.

The only force acting on a 4.2 kg body as it moves along the positive x axis has an x component Fx= -4x N, where x is in meters. The velocity of the body at x = 1.7 m is 8.1 m/s. (a) What is the velocity of the body at x = 3.9 m? (b) At what positive value of x will the body have a velocity of 2.3 m/s? (a) Number i Units (b) Number i Units

a 4.0kg object is moving with a speed of 2.0 m/s. a 1.0 kg object is moving with a speed pf 4.0 m/s. both objects encounter the same constant braking force and brought to rest. which object travels the greater distance?