Question

Imagine a skateboarder rolling down a hill. As the rider travels down, the PE is turning into KE. But the rider is still slowing down. What causes this?
Question 2 options:

The rider is feeling the effects power transfer


The rider is feeling the effects potential energy


The rider is feeling the effects of friction


The rider is feeling the effects Kinetic energy

Question 3 (1 point)
When Is Mechanical Energy Not Conserved?

Question 3 options:

when there is significant friction or air resistance or other force affecting on the object.


when the electricity is turned off


when it is cold outside


when you are in outer space

Question 4 (1 point)
When a child slides down a slide (if there is no friction and all of the mechanical energy is conserved) what would happen?

Question 4 options:

Kinetic energy would turn in to Potential energy


The energy is destroyed


All energy stays the same


Potential energy would turn to Kinetic energy

Question 5 (1 point)
What is true about the distance traveled by the ping-pong ball at the bottom of the ramp?

Question 5 options:

The greater the distance, the less energy the ping-pong ball had.


The ping-pong ball did not have any energy as it traveled short or long distances.


The greater the distance, the more energy the ping-pong ball had.


Neither mass nor speed had any impact on the distance traveled.

Question 6 (1 point)
If a ball is rolling down the hill, what force is acting on this ball?

Question 6 options:

Elasticity


Gravity


Wind energy


Chemical energy

Question 7 (1 point)
Conservation of Mechanical energy is defined as

Question 7 options:

Energy of motion


The sum of the kinetic and potential energies of an object remains a constant value unless there are forces acting on the object that cause a loss of energy overall, such as friction and air resistance.


law of conservation of energy


potential energy added to kinetic energy

Question 8 (1 point)
Which statement is true regarding the ping-pong ball at the bottom of the ramp in the experiment, “Rolling Along”?

Question 8 options:

No energy was involved in this experiment.


Only potential energy from the ball coming down the ramp will be given to the ping-pong ball at the bottom of the ramp.


The kinetic energy of the ball coming down the ramp will be given to the ping-pong ball at the bottom of the ramp.


All kinetic energy remains with the ball that is coming down the ramp- none of it transfers to the ping-pong ball at the bottom.

Question 9 (1 point)
If a small car and a large truck were moving at the same rate of speed, what would be a true statement?

Question 9 options:

The car would have a shorter stopping distance.


All choices shown


The truck’s mass is greater, therefore it will have a greater stopping distance


The truck would have greater kinetic energy.

Question 10 (1 point)
Saved
In which example would the most transfer of energy take place from Mechanical energy to Thermal (heat) energy?

Question 10 options:

When a feather falls from the sky


When a child slides down a waterslide on an innertube


When a metal plate is pressing against a fast spinning piece of steel hard enough to stop it


When a skydiver opens her parachute

Answer 1

Answer:when there is significant friction or air resistance or other force affecting on the object.

Explanation: