1. Martha is pushing a 35 kg chair across the floor. The coefficients of fre chair and floor are µs 0.70 and µk = 0.40. %3D a) How hard does she need to push horizontally to just start the chair moving? b) If she applies this same force once it is moving, what is the resulting acceleration? Draw the free-body diagram for this situation.

What’s the answer to A B and C?

You want to move a 400-N crate across a level floor by pulling upward on the rope at an angle of 30o above the horizontal. How hard must you pull to keep it moving with an acceleration of ax = 0.5 m/s2 ? Assume that μk = 0.30.

Plz use g = 9.8 m/s2

Two people are pushing an object. The first person applies 600N of force to the West. The net force acting on the object is 450N. The object is accelerating at 2.3 m/s?. a. Draw the free body diagram. b. What force is the second person pushing on the object? c. What is the mass of the object?

A force 450 N pushes on a 30.7 kg box at an angle of 50° from the horizontal. Starting from rest , the box achieves a velocity of 16.37 m/s in a time of 3.7 s. Find the coefficient of kinetic friction between the box and the floor.   a. 0.24 b. 0.45 c. 0.51 d. 0.35   A child on a sled has been given a push so that he is moving up a hill. The hill is covered with icy snow and can be treated as frictionless. The child has a mass of 22.7 kg; the sled has a 3.18 kg. How far will he go before coming to a stop if his speed is 2.44 m/s when he starts at the bottom of the hill? He holds on tightly and so does not fall off the sled, and the hill makes an angle of 25.50 with the horizontal.   a. 0.29 m b. 1.14 m c. 1.41 m d. 0.70 m

Asap plzzzzz

A 200-g hockey puek is launched at an initial speed of 16 ni/'s up a metal ramp that is inclined at a B0° angle. Thecoefficients of statie and kinetic- friction between the hockey puck and the metal ranp are us =0.40 and uk=0.30, respectively. a. Sketch the situation and make a motion diagram (including acceleration vector) for the puck. b. Make a force diagram for the puck at at instant during its way up the ramp. c. Write an equation representing the sum of forces along the slope and an equation representing the sum of forces perpendicular to the slope. d. Find the friction force between the puck and the ramp. Show all work. e. Find the acceleration of the puck as it travels up the ramp. Show all work. f. Would the puck have greater, sımaller or saine acceleration if it had twice the mass (everything else about the situation being the same)?

a. What is the total acceleration of block B in m/s2 ? b. What is the value of the resulting force in kg?  c. What is the value of the velocity in m/s after 4s?