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A boy is trying to walk his dog West. However, the dog resists the force applied by the boy and instead moves East. Which of the following best describes the forces in this situation?
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
Which simple machine would be the most efficient for lifting an object 30 m off the ground?
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
How can simple machines makes work easier?
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
Where does one look on a graph to find when an object has the greatest average speed
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
Which simple machines are used to form a wheelbarrow?
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
Describe the energy transformation that occurs as a force acts on a mass at point A and causes it move to point B.
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
A student is organizing a room. She moves a box from the floor to a shelf. She wants to estimate the amount of potential energy the box has on the shelf. What information does she need?
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
When does an object that is thrown up in motion have the least kinetic energy?
at the highest point of the line on the graph
the mass of the box and height of the shelf
by decreasing the force needed to complete the task
lever, wheel and axle
potential energy is converted into kinetic energy
pulley
when it changes direction
the forces are unbalanced and the dog's force is greater
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Match it!
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