A small block is resting on a rough incline. There is a rope attached to the block that is pulling on it up the incline. Analyze the free body diagram provided and identify the forces. Be as specific as you can. Each correctly identified force is worth marks. y, A C. 1. Gravitational Force 2. Spring Force B 3. Tension 4. Normal Force D. 5. Static Friction 6. Kinctic Friction 7. Drag 8. Thrust

A 10-kg wooden box rests on a ramp that is lying flat. The coefficient of static friction is 0.50, and the coefficient of kinetic friction is 0.30. What is the friction force between the box and ramp if a 30 N horizontal force is applied to the box? A.50 N B.20 N C.0 N D.30 N

Sledding A sled with a mass of 80.0 kg is pulled along flat, snow-covered ground. The static friction coefficient is 0.30, and the kinetic friction coefficient is 0.10. a. What does the sled weigh? b. What force will be needed to start the sled moving? c. What force is needed to keep the sled moving at a constant velocity? d. Once moving, what total force must be applied to the sled to accelerate it at 3.0 m/s??

Apply Newton’s 2nd Law to this situation. To do that: 1. Identify the forces: a. Draw a diagram of the situation. b. Draw a force diagram of the object. c. Define/choose an appropriate coordinate axis and find the x and/or y components of each force on your force diagram.

18. A child sits on a sled at the top of a hill, the hill makes an angle of 20° with the horizontal. The child's mass is 40kg. Use us = .1 and 4.03 a. b. Draw a free body diagram for this system. Does the child accelerate down the hill? *i.e., check that the coefficient of static friction is vercome by the component of the childs weight in the direction the child would accelerate. If they do, what is their acceleration? *use coefficient of kinetic friction in sum of the forces balance if the child moves.

while tom pushes a 40 kg box in horizontal direction along the classroom floor with a 100 N force, the box is moving in a straight line with constant speed of 0.5 m/s. Ignor air resistance when answering the questions below. a. Write down as much information as you can about the main horizontal forces exerted on the box ( names, directions and if enough information is given, numerical values). b. Write down as much information as you can about the main vertical forces exerted on the box (names, directions, and whenever possible, if enough information is given, numberical values). c. How far did the refrigerator move during those 3 seconds? Explain d. What was the refrigerator's acceleration during that time? Explain