Work Test Review: Question Preview (ID: 19397)


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Which of the following is done when a force causes an object to move?
a) work b) pressure c) power d) friction
A box slides along a smooth surface more easily than a rough surface because there is
a) less friction between the box and the smooth surface b) more friction between the box and the smooth surface c) no friction between the box and the rough surface d) less friction between the box and the rough surface
A wilted plant is given water and it becomes tall and strong because of
a) turgor pressure b) buoyancy c) density d) osmosis
You gently roll a ball across the gym floor. What force will eventually make it come to a stop?
a) friction b) gravity c) the force of push will run out d) the ball will not stop rolling
The goal of a simple machine is usually to reduce the amount of
a) force needed to move an object b) friction working against an object c) work exerted on an object d) distance an object travels
What effect can a simple machine have when used to move an object?
a) A simple machine reduces the amount of force required to move an object by increasing the distance the object moves. b) A simple machine reduces the amount of work required to move an object by increasing the force on the object. c) A simple machine reduces the amount of energy required to move an object by increasing the work on the object. d) A simple machine reduces the amount of power required to move an object by increasing the distance the object moves.
The advantage of using an inclined plane is to reduce the
a) force needed to lift the heavy objects b) time needed to load many objects c) work being done while moving objects d) amount of friction affecting the objects
What is a disadvantage of using an inclined plane to left a heavy object?
a) the object must be moved a greater distance b) it takes less effort to move the object c) many objects are difficult to lift straight up d) heavy objects usually take up more space
Which of the following decreases when an object is moved using an inclined plane?
a) the force needed to move the object b) the distance the object moves c) the pull of gravity on the object d) the amount of space the object takes up
An inclined plane reduces the amount of force needed to move an object by
a) increasing the distance the object moves b) decreasing the pull of gravity on the object c) reversing the direction the object is moved d) transferring more of the force to the object
How could students find out whether a short ramp or a long ramp would require less force to use? They could measure the amount of force it takes to move...
a) an object up two ramps with the same height, but different lengths b) an object up two ramps with equal heights and equal lengths c) an object up two ramps with the same length, but different heights d) one object up a ramp and a larger object up the same ramp
50 Newtons of force was used to move a box a distance of 12 meters. How much work was done on the box?
a) 600 Joules b) 100 Joules c) 1200 Joules d) 1800 Joules
If an object does not move when a force is applied to it, then...
a) there is no work done b) there is a net force c) the forces are unbalanced d) there is too much turgor pressure
A book is sitting on a table. Which of the following actions would add to its potential energy?
a) lifting it to a higher shelf b) slide it across the table c) open it to the middle page d) dropping it to the floor
When would a skateboarder have the most potential energy?
a) at the top of the ramp b) while rolling down the ramp c) while moving up the ramp d) at the bottom of the ramp
As a ball rolls from the top of a hill to the bottom, how does its potential and kinetic energy change?
a) potential decreases and kinetic increases b) potential and kinetic energy both increase c) potential increases and kinetic decreases d) potential and kinetic energy both decrease
Which of these best shows a change from potential to kinetic energy?
a) water flowing over a tall cliff b) a rubber band being stretched c) electricity making a bulb light up d) a rock sitting on top of a mountain
Potential energy and kinetic energy are similar in that both...
a) can be converted into the other form b) are demonstrated when an object is at rest c) depend on the height of an object above the ground d) will produce an increase in the mass of an object
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