Presentation on theme: "Force Scenario Solutions"— Presentation transcript:
1Force Scenario Solutions Joe CoxBrookwood High School
2Scenario 1A block of mass 5 kg is setting on a frictionless table. It is connected by a massless string to a 3 kg mass, which is hanging from a massless-frictionless pulley at the edge of the table.
3Scenario 2Repeat the problem above if the coefficient of friction between the table and the 5 kg block is .3.
4Scenario 3The engines of a 100 N rocket exert a 1,000N thrust for the first ten seconds of flight.
5Scenario 4Repeat the problem above after engines of the rocket turn off.
6Scenario 5A braking force of 10,000 N slows a car traveling at a speed of 30 m/s.
7Scenario 6A block slides down a 30o frictionless incline.
8Scenario 7Repeat the problem above if friction is present and the block slides at constant velocity.
9Scenario 8A block slides at constant velocity on a frictionless horizontal surface.
10Scenario 9A block slides at constant velocity on a horizontal surface where friction is present.
11Scenario 10A block with an initial velocity slides up a 30o incline where friction is present.
12Scenario 11A block with a mass 10kg is on a frictionless surface. An 8 kg block is placed to the left of the 10 kg block so that the two blocks are touching each other. A 36 N force pushes the 8 kg block to the right.
13Scenario 12A block of mass M is connected by a string to a block with a mass of m. A second horizontal string is attached to m which pulls both blocks across a frictionless horizontal surface with an acceleration, a.
14Scenario 13A lawn mower is pushed across a lawn at a constant velocity by applying a force, F along the handle of the lawn mower that makes an angle of 30o with the horizontal.
15Scenario 14A child pulls a red wagon at a constant velocity by applying a force, F along the handle that makes a 45o to the horizontal.
16Scenario 15A cable is connected to a hook of mass m. The hook is attached to a rope that is connected to a crate of mass M. The motor that pulls the cable upward exerts the minimum force necessary to lift the load.
17Scenario 16An elevator of weight W accelerates downward with acceleration, a.
18Scenario 17A crate sits in the back of a truck that is accelerating to the right. The crate does not move relative to the bed of the truck. Draw the free body diagram and sum the forces for the crate only.
19Scenario 18A pendulum is pulled back 15o from the vertical and released. Draw the free body diagram and sum the forces when the pendulum bob is at its lowest position.
20Scenario 19A pendulum is pulled back 15o from the vertical and released. Draw the free body diagram and sum the forces when the pendulum bob is at its highest position.
21Scenario 20A 200 N sign hangs from two cables that make an angle of 50o with each other.
22Scenario 21A cable that makes an angle of 30o with the horizontal and a second cable that is completely horizontal support a 100kg load.
23Scenario 22A block of mass M and a block of mass m are hanging from opposite sides of a massless, frictionless pulley. (M>m)
24Scenario 23A block of mass M is pulled up a 20o incline with friction by a string that passes over a light frictionless pulley at the top of the incline. The string is attached to a block of mass m that hangs vertically from the pulley. (M>m)
25Scenario 24Block A rests on top of Block B which is sitting on a table.
26Scenario 25A car goes around a curve of radius, R at a constant speed, v.
27Scenario 26 A car goes around a frictionless curve banked at 20o. Always draw the banked curve at a very small or very large angle. As a result it is obvious which angle in the component triangle is equal to the angle of the bank.
28Scenario 27A bucket attached to a string is at the top of a vertical circle.
29Scenario 28A bucket attached to a string is at the bottom of a vertical circle.
30Scenario 29A person riding a roller coaster feels weightless at the top of a vertical loop.
31Scenario 30A flying toy is hanging from the ceiling as it flies in a horizontal circle. At any instant the string connecting the toy to the ceiling makes an angle of 30o with the vertical.