1. sally's car is stuck in the mud. sam pushes the car for 3 minutes with a force of 2250 Newtons, however, he is unable to move the car. How much work has Sam done? Explain fully.
2. the following statements are used to describe work.
a) work is done only if an object moves through a distance.
b) work is only done only if energy is transferred from one form to another.
c) work is done only if a force is applied.
Now which of the three statements in question 2 is true?
a) only one is true
b) all three statements are true
2. the following statements are used to describe work.
a) work is done only if an object moves through a distance.
b) work is only done only if energy is transferred from one form to another.
c) work is done only if a force is applied.
Now which of the three statements in question 2 is true?
a) only one is true
b) all three statements are true
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1. sally's car is stuck in the mud. sam pushes the car for 3 minutes with a force of 2250 Newtons, however, he is unable to move the car. How much work has Sam done? Explain fully.
Work = Force exerted on car * distance moved in the same direction as the force was exerted!
Since he is unable to move the car, distance = 0 meters
Work = 2250 * 0 = 0
2. the following statements are used to describe work.
a) work is done only if an object moves through a distance. YES
b) work is only done only if energy is transferred from one form to another. As Sam pushed on Sally’s car the car could have moved up and down. So Sam could have transferred some vibration energy to the car, without actually moving the car a specific distance.
NO
c) work is done only if a force is applied. NO
Now which of the three statements in question 2 is true?
a) only one is true
b) all three statements are true
Work = Force exerted on car * distance moved in the same direction as the force was exerted!
Since he is unable to move the car, distance = 0 meters
Work = 2250 * 0 = 0
2. the following statements are used to describe work.
a) work is done only if an object moves through a distance. YES
b) work is only done only if energy is transferred from one form to another. As Sam pushed on Sally’s car the car could have moved up and down. So Sam could have transferred some vibration energy to the car, without actually moving the car a specific distance.
NO
c) work is done only if a force is applied. NO
Now which of the three statements in question 2 is true?
a) only one is true
b) all three statements are true