Force, Work And Energy: Question Preview (ID: 7294)


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Which of the following equations correctly describes the amount of work done?
a) force x energy b) force x distance c) speed x time d) speed x force
Which of the following is the correct unit to measure the amount of work done?
a) kilogram b) Newton c) Joule d) meter
A boy balanced a box that weighed 40 Newtons on his head for 5 minutes. If the boy was 1.5 meters tall, how much work did he do?
a) 0 J b) 200 J c) 60 J d) 300 J
A force of 100 Newtons was used to push a 10 kilogram box through a distance of 5 meters. What is the amount of work done?
a) 5000 J b) 500 J c) 50 J d) 1000 J
Harry uses a force of 20 Newtons to move a box a distance of 4 meters. Joshua uses a force of 40 Newtons to move a box a distance of 2 meters. Which statement is TRUE?
a) Work done by Harry is greater than the work done by Joshua. b) Work done by Joshua is greater than the work done by Harry. c) Work done by Harry is the same as the work done by Joshua. d) Work done by Joshua is twice the work done by Harry.
Harry uses a single fixed pulley to lift water from a well. Which of the following statements regarding the pulley is true?
a) The pulley reduces the amount of work that needs to be done. b) The pulley changes the direction of the force applied. c) The pulley increases the amount of force applied. d) The pulley decreases the amount of force applied.
Which of the following statements about work is true?
a) It measures how quickly an object accelerates. b) It measures how much effort is applied over a certain distance. c) It measures the change in an object's rate of speed. d) It measures how much time it takes to move a massive object.
A kid applies a force of 70 Newtons to a ball over 1.1 meters. How much work did he do on the ball?
a) 770 J b) 0.7 J c) 77 J d) 7.7 J
A ramp makes work easier by increasing:
a) The distance over which work is done. b) The force needed to do work. c) The time required to do work, d) The acceleration of a massive object.
push or pull that causes an object to change its speed and/or direction is –
a) potential energy b) force c) velocity d) acceleration
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