Free-body diagrams Knowledge-Based Download PDF
20 Physics practice questions on Free-body diagrams. Questions that assess core concepts and understanding.
Questions
- 1.
A package moves to the right at a constant velocity on a horizontal conveyor belt without slipping, and air resistance is negligible. Which horizontal forces must be included on the free-body diagram of the package?
- 2.
A block slides across a rough horizontal tabletop, pulled by a taut horizontal cord that passes over a frictionless pulley and connects to a hanging weight. Which forces must be included on the free-body diagram of the sliding block?
- 3.
A uniform ladder rests in static equilibrium with its upper end leaning against a smooth, frictionless vertical wall and its lower end on a rough horizontal floor. Which forces must be included on the free-body diagram of the ladder?
- 4.
A block is held in static equilibrium on a smooth, frictionless inclined plane by an applied force directed horizontally toward the incline. Which forces must be included on the free-body diagram of the block?
- 5.
A tetherball moves in a horizontal circle at constant speed while suspended by a taut cord attached to a vertical pole. Assuming air resistance is negligible, which forces must be included on the free-body diagram of the ball?
- 6.
A baseball travels through the air along a parabolic path after being struck by a bat. Assuming air resistance is negligible, which forces must be included on the free-body diagram of the baseball while it is in flight?
- 7.
A car travels at constant speed around a flat, unbanked horizontal curve without slipping. Which forces must be included on the free-body diagram of the car?
- 8.
Two blocks of different masses are connected by a light, taut string that passes over a frictionless pulley in an Atwood machine. As the lighter block accelerates upward, which forces must be shown on its free-body diagram?
- 9.
A crate rests on the flat horizontal bed of a truck that is accelerating forward on a level road. If the crate does not slip relative to the bed, which horizontal force must be included on the free-body diagram of the crate?
- 10.
A roller coaster car travels on the inside of a vertical circular loop and passes through the highest point of the loop at high speed, remaining in contact with the track. Assuming air resistance and friction are negligible, which forces must be included on the free-body diagram of the car at this highest point?
- 11.
A student holds a textbook stationary against a flat, horizontal ceiling by exerting a vertical pushing force straight upward. Which forces must be included on the free-body diagram of the textbook?
- 12.
A simple pendulum bob swings through the lowest point of its trajectory while moving to the right, with air resistance assumed negligible. Which forces must be included on the free-body diagram of the bob at this instant?
- 13.
Two blocks, X and Y, are placed in contact on a frictionless horizontal surface. If a person applies a horizontal force to the right on block X, causing both blocks to accelerate together, which horizontal forces must be shown on the free-body diagram of block X?
- 14.
Block A rests on top of block B, which sits at rest on a horizontal table. Which of the following forces should be included on the free-body diagram of block B?
- 15.
A sled is pulled along a flat, frictionless horizontal surface by a rope that exerts a constant tension directed at an angle above the horizontal. If the sled remains on the surface, which statement correctly describes the magnitude of the normal force relative to the gravitational force in the free-body diagram of the sled?
- 16.
A block is held stationary against a vertical wall by a horizontal pushing force applied perpendicular to the wall. In the free-body diagram of the block, which force acts vertically upward to balance the downward gravitational force?
- 17.
An elevator suspended by a single cable is moving upward while slowing down. Which statement correctly describes the force vectors in the free-body diagram of the elevator?
- 18.
When constructing a free-body diagram for an accelerating object, which of the following should be omitted from the diagram?
- 19.
A crate rests in static equilibrium on a rough inclined ramp. Which of the following lists all the forces that must be included on the free-body diagram of the crate?
- 20.
A wooden block is sliding to the right across a rough horizontal surface and slowing down after an initial push has ended. Which forces must be included on the free-body diagram of the block during this motion?