Identifying Forces Worksheet - Weebly
Worksheet #1: Identifying Forces
OBJECTIVE: To identify all the forces acting on an object in various situations and to pictorially depict the forces. The object is in bold.
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1. A skier is being towed up a snow covered hill by a tow rope. What forces are being exerted on the skier?
2. An elevator, suspended by a single cable, had just left the tenth floor and is speeding up as it descends toward the ground floor.
3. A jet plane is speeding down the runway during takeoff. Air resistance is not negligible.
4. A skier is going down a 20° slope. A horizontal headwind is blowing in the skier’s face. Friction is small but not negligible.
5. A spring loaded gun shoots a plastic ball. The trigger has just been pulled and the ball is starting to move down the barrel. The barrel is horizontal.
6. A bungee jumper has leapt off a bridge and is at the bottom of her fall. What forces are being exerted on the bungee jumper?
7. A worker drags a crate across the factory floor by pulling on a rope tied to the crate.
8. A penny is placed on a card which is on the rim of a cup. The card is pulled sideways suddenly.
9. A heavy box is at the back of a truck. The truck is accelerating to the right. The box is not sliding.
10. A person is standing on a straight horizontal moving walkway. The moving walkway is moving with a constant speed of 2m/s.
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1. Identify “the object” and “the environment”.
2. Draw a diagram depicting the situation. Highlight the object of interest.
3. Locate every point/surface on object where the environment exerts contact forces on the object.
4. Name and label all forces acting on the object – contact or long range.
5. Pay particular attention to the direction of the various forces.
6. Where applicable/known draw the lengths of arrows to match the description.
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