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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
| C | I | Question | Answer |
|---|---|---|---|
| 4 | Hector drives a pickup truck horizontally at 15.0 m/s. He is transporting a crate of delicate lead crystal. If the coefficient of static friction between the crate and the truck bed is 0.400, what is the minimum stopping distance for the truck so the crate will not slide? | 18.7M | |
| 4 | If we know an object is moving at constant velocity, we may assume: | the net force acting on the object is zero. | |
| 4 | If we know that a nonzero net force is acting on an object, which of the following must we assume regarding the object's condition? The object is: | being accelerated. | |
| 4 | In the terminology a 500-N block, the 500-N refers to the block's: | weight. | |
| 4 | It is late and Carlos is sliding down a rope from his third-floor window to meet his friend Juan. As he slides down the rope faster and faster, he becomes frightened and grabs harder on the rope, increasing the tension in the rope. As soon as the upward tension in the rope becomes equal to his weight: | Carlos will continue down at a constant velocity. | |
| 4 | Jamal pulls a 150-N sled up a 28.0° slope at constant speed by a force of 100 N. Near the top of the hill he releases the sled. With what acceleration does the sled go down the hill? | 2.67 n/s^2 | |
| 4 | Rita accelerates a 0.40-kg ball from rest to 9.0 m/s during the 0.15 s in which her foot is in contact with the ball. What average force does she apply to the ball during the kick? | 24N | |
| 4 | The accelerating force of the wind on a small 200-kg sailboat is 707 N northeast. If the drag of the keel is 500 N acting west, what is the acceleration of the boat? | 2.5 m/s^2 due north | |
| 4 | The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. An astronaut's life support backpack weighs 300lbs on Earth. What does it weigh on the Moon? | 50lb | |
| 4 | The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.0 m/s2 on the moon? | 120N | |
| 4 | The coefficient of friction between a racecar's wheels and the track is 1.0. The car starts from rest and accelerates at a constant rate for 400 m. Find the maximum speed at the end of the race. | 89m/s | |
| 4 | The coefficient of static friction between the tires of a car and the street is μs = 0.77. Of the following, what is the steepest inclination angle of a street on which a car can be parked (with wheels locked) without slipping? | 37° | |
| 4 | The maximum possible value for the coefficient of static friction is: | greater than 1.00. | |
| 4 | The statement by Newton that "for every action there is an opposite but equal reaction" is regarded as which of his laws of motion? | Third | |
| 4 | There are six books in a stack, each with a weight of 5.0 N. The coefficient of friction between all the books is 0.20 as is the coefficient between the table and the bottom book. What horizontal push must I just exceed on the next to bottom book to start sliding the top five books off the bottom one? | 5.0N |
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