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AP Physics final
| Question | Answer |
|---|---|
| A ball is launched from the ground with an initial velocity of 8 m/s at an angle of 60 degrees above the horizontal. What is the approximate maximum height above the ground reached by the ball? | 2.4 meters |
| A horizontal disk rotates at a constant angular speed w. As viewed from above, a coin of mass m on the disk moves counterclockwise in a circle of radius R as shown. Which vector is friction direction? | up arrow |
| A horizontal disk rotates at a constant angular speed w. As viewed from above, a coin of mass m on the disk moves counterclockwise in a circle of radius R as shown. Which expression is minimum status friction? | (Rw^2/g) |
| At time t=0 an object has v=4.2 - 1.4t. When does the object change direction? | 3 seconds |
| The graphs show the magnitude F of the force for two trials. W1 and W2 is shown on the graphs with force. Compare works, why? | W1<W2 because area under curve F1 is smaller |
| A projectile is launched with initial speed v at angle theta. WHich graphs shows vertical components of v and a? | V decreases constant, a is constant negative |
| Four different forces are exerted on an object of mass 2 kg. The figure shows forces. If initial rest, how long will it take the object to reach 2 m/s? | 4 seconds |
| Three identical asteroids are equidistant. Rank the net forces | Fa>Fb since Fn on B is zero |
| An object is traveling across a flat horizontal surface with constant velocity when Fn is exerted. When does KE stay constant? | Force exerted 90 degrees from velocity direction |
| A block is pushed up an incline with a rough surface at a constant speed v with constant force F parallel to the incline. When force F moves the block up, power is P1. Ratio? | P1:P2 is 1:2 |
| A block is pushed up an incline with a rough surface at a constant speed v with constant force F parallel to the incline. Which describes Wg and Wn of the block as it moves up? | Wg is negative Wn is zero |
| Two systems are in oscillation, a pendulum and a block oscillating. Which changes makes them have the same period? | Decreasing the mass of both |
| Water fills a pipe of radius r as it exits the pipe. What equals the time to fill the pool with water from the pipe? | LWH/pi(r^2)v |
| A block slides across a surface. It slows to a stop at distance D, second scenario stop at distance 4D. Compare ratio t1:t2 | 1:4 |
| A student takes an object to the top of a cliff and throws it. The KE graph is shown. Was the object thrown up or down? | Object up; KE decreases then increases |
| A block of mass 2 kg slides w speed 3 m/s and collides with block 1 kg at rest. The final speed is 1 m/s. What is the change in KE/Work? | 0 J change |
| A horizontal beam of mass m and length L attaches to a wall. What is the expression for tension? | ((1/2m +M)g/sintheta) |
Created by:
aophia