Three ice skaters, numbered 1,2, and 3, stand in a line, each with her hands on the shoulders of the skater in front. Skater 3, at the rear, pushes on skater 2. Identify all the action/reaction pairs of forces between the three skaters. Draw a free-body diagram for skater 2, in the middle. Assume the ice is frictionless.

A box is being dragged across the floor at a constant speed by a rope pulling horizontally on it. Friction is not negligible.

You hold a picture motionless against a wall by pressing on it, as shown in what we discussed earlier.

For the problem, identify all the forces acting on the object and draw a free-body diagram of the object. A box is being dragged across the floor at a constant speed by a rope pulling horizontally on it. Friction is not negligible.

Your car is accelerating to the right from a stop. Identify all forces acting on the object and draw the free-body diagram. Draw the force vectors with their tails at the dot. The orientation of your vectors will be graded. The exact length of your vectors will not be graded but the relative length of one to the other will be graded. The $4$ forces are:

• Normal Force
• Weight
• Drag
• Force of Friction on the car

For the problem, identify all the forces acting on the object and draw a free-body diagram of the object. A skydiver has his parachute open and is floating downward through the air at a constant speed.

The light turns green and you accelerate rapidly forward so that you and your passenger feel "thrown back" into your seat. Consider your passenger to be the object.

A skydiver has his parachute open and is floating downward through the air at a constant speed.

A student draws the flawed free-body diagram shown as we discussed earlier to represent the forces acting on a car traveling at constant speed on a level road. Identify the errors in the diagram, then draw a correct free-body diagram for this situation.

A gymnast has just landed on a trampoline. She's still moving downward as the trampoline stretches. Draw a free-body diagram for the gymnast. Draw the force vectors with their tails at the dot. The orientation of your vectors will be graded. The exact length of your vectors will not be graded but the relative length of one to the other will be graded.

Dash is standing on his frictionless skateboard with three balls, each with a mass of 100 g, in his hands. The combined mass of Dash and his skateboard is 60 kg. How fast should Dash throw the balls forward if he wants to move backward with a speed of 0.50 m/s? Do you think Dash can succeed? Explain.

Two skaters stand a short distance apart, facing each other on frictionless ice. Explain what happens when they begin tossing a ball back and forth.

In t-ball, young players use a bat to hit a stationary ball off a stand. The 140 g ball has about the same mass as a baseball, but it is larger and softer. In one hit, the ball leaves the bat at 12 m/s after being in contact with the bat for 2.0 ms. Assume constant acceleration during the hit. a. What is the acceleration of the ball? b. What is the net force on the ball during the hit?

Your Car Is Skidding To A Stop From A High Speed. Draw a free-body diagram of the car; Suppose that the car moving on the right; Draw the vectors starting at the black dots. The location and orientation of the vectors will be graded: The length of the vectors will not be graded.