Work: Question Preview (ID: 12042)


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A student pushed a heavy door, but it did not budge. Another student came and pushed with him and the door opened an inch. A third student helped push and the door opened 2 feet
a) On all three pushes b) On none of the pushes c) On the first and second pushes d) On the second and third pushes
In the game of basketball, one player passed the ball to a player next to him. The second player passed the ball all the way down the court to a third player. The third player he
a) The first and second player b) Only the second player c) Only the third player d) The second and third player
What is needed in order to perform work on an object?
a) A force needs to be applied to the object b) The object needs to move c) A force needs to be applied to the object and the object needs to move d) The object needs to have balanced forces applied to it
Sally needs to place a 40N barrel into a truck. Sally uses a ramp to help her load the barrel onto the truck. The ramp is 6 meters long. How much work does Sally perform on the
a) 0.24J b) 2.4J c) 24J d) 240J
Paul is moving two identical boxes. He picks up one box and lifts it one meter straight up. This requires 180N of force. He pushes the second box up a ramp that is 3 meters long
a) Paul performs three times more work to lift the box straight up b) Paul performs 120N less work to push the box up the ram c) Paul performs the same amount of work to move each box d) Paul performs less work to lift the box straight up
How much work (in Joules) is done if 4N of force is used to move a box 3 meters?
a) 1.75J b) 1J c) 7J d) 12J
Two workers load wooden barrels that are all the same mass into a truck. One worker lifts a barrel and places it in the truck. The other worker rolls a barrel up a ramp into the
a) The worker lifting the barrel into the truck because he must apply a greater force to the barrel b) The worker using the ramp because he must move the barrel a greater distance c) The worker lifting the barrel into the truck because he must lift the barrel and walk with it d) Both workers are doing the same amount of work loading the wooden barrel into the truck
The picture above show movers using an inclined plane to move a piano onto a truck. The mass of the piano being moved is the same in both pictures. Which of the following describ
a) The force applied by both movers is the same b) The movers using the longest ramp is applying the most force c) The movers using the shortest ramp is applying the most force d) Both movers are using more force than if they were not using an inclined plane
Which of the following describes an effect a simple machine has when used to move an object?
a) A simple machine reduces the amount of work required to move an object by increasing the force on th b) A simple machine reduces the amount of energy required to move an object by increasing the work on t c) A simple machine reduces the amount of force required to move an object by increasing the distance t d) A simple machine reduces the amount of power required to move an object by increasing the distance t
What evidence proves that work is being done on an object?
a) An object moves in the opposite direction of the applied force b) An object’s mass increases c) An object remains stationary d) An object moves in the direction of the applied force
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