WorksheetsFields of Force and Potential Energy 2020
Total questions: 15
Worksheet time: 10mins
Magnets A and B are of equal magnetic strength. In which position will magnets A and B have the least attractive force toward one another.
Magnets A and B are of equal magnetic strength. In which position will magnets A and B have the greatest force of repulsion away from one another.
The picture shows how to make an electromagnet. Which of the following would make the electromagnet stronger?
Wrapping the wire around a nonmetallic object
Using a longer wire from the battery to the nail
Wrapping the wire around the nail more times
Making the loops of wire less tightly coiled
A scientist runs an electric current along a wire. A magnetic compass is placed near the wire. The scientist observes that whenever the current is turned on, the compass needle moves. Why does the compass needle move?
The current creates an electric field around the wire.
The current creates a magnetic field around the wire.
The current adds electric charge to the compass needle.
The current increases the force of gravity on the compass needle
A teacher demonstrates a chemical reaction of a hand warmer. Hand warmers are used by people to warm their hands in cold weather. When opened, the iron in the warmer reacts with the air, producing heat and a reddish-brown substance.Select all statements that apply to the hand warmer reaction.
The reactants and products have equal potential energy.
The products have more potential energy than the reactants.
The reactants have more potential energy than the products.
Heat is released to the surroundings.
Heat is absorbed from the surroundings
The diagram below shows a boulder rolling down a hill into a valley and then up the opposite hill. At which position does the boulder have the least gravitational potential energy?
A
B
C
D
Students examine a spring (A)at rest, and then hang different masses from the spring (B & C). How much elastic potential energy does Spring A have compared to the others?
Zero Elastic Potential Energy
More Elastic Potential Energy than both B and C
More Elastic Potential Energy than B and less than C
Less Elastic Potential Energy than both B and C, but it does have some elastic potential energy.
Students examine a spring (A)at rest, and then hang different masses from the spring (B & C). How much elastic potential energy does Spring B have compared to the others?
Zero Elastic Potential Energy
More Elastic Potential Energy than both A and C
More Elastic Potential Energy than A and less than C
Less Elastic Potential Energy than both A and C, but it does have some elastic potential energy.
Students examine a spring (A)at rest, and then hang different masses from the spring (B & C). How much elastic potential energy does Spring C have compared to the others?
Zero Elastic Potential Energy
More Elastic Potential Energy than both A and B
More Elastic Potential Energy than A and less than B
Less Elastic Potential Energy than both A and B, but it does have some elastic potential energy.
One bar magnet sits on a table, and a rubber band suspends another magnet above it. In the view on the left, the upper magnet is held in place and cannot move. In the view on the right, the upper magnet has been released. How did the potential energy change when the upper magnet was released?
Magnetic, elastic and gravitational potential energy increased.
Magnetic, elastic and gravitational potential energy decreased.
Magnetic and elastic potential energy increased, and gravitational potential energy decreased.
Magnetic and gravitational potential energy decreased, and elastic potential energy increased.
A negatively charged particle is lifted 30 cm above a positively charged sphere.How did the potential energy of the negatively charged particle change as it was lifted?
Electric potential energy increased, gravitational potential energy decreased.
Electric potential energy decreased, gravitational potential energy increased.
Electric and gravitational potential energy decreased.
Electric and gravitational potential energy increased
When an archer fires an arrow from a traditional bow, the string of the bow does not change in length. As shown in the diagram, the archer pulls back on the string (Step 1), changing the curve of the bow (Step 2). When the archer releases the string, the bow returns to its original shape (Step 3). How does the elastic potential energy in the bow change as the archer fires an arrow?
It decreases from Step 1 to Step 2, then increases to Step 3.
It increases from Step 1 to Step 2, then decreases to Step 3.
It remains constant from Step 1 to Step 2, then increases to Step 3.
It remains constant from Step 1 to Step 2, then decreases to Step 3.
Four people return home from work and walk up the stairs to their own apartments in the same building.Which person has gained the most gravitational potential energy upon arriving at the door of his or her apartment?
a 50 kg person who lives on the second floor
a 50 kg person who lives on the third floor
a 100 kg person who lives on the second floor
a 100 kg person who lives on the third floor
A gymnast performs on a trampoline. Figure 1 shows the gymnast at her lowest point. Figure 2 shows the gymnast at her highest point.Which table shows how gravitational and elastic potential energy change between Figure 1 and Figure 2?
Two positively charged particles are attached to a spring. A metal sphere is placed near each charged particle, as shown in the diagram. Positive charge is slowly added to Sphere A. An equal amount of negative charge is slowly added to Sphere B. Assume the two systems are isolated from each other. How does the elastic potential energy change for each of the springs?
The elastic potential energy of both springs will increase equally.
The elastic potential energy of both springs will decrease equally.
The elastic potential energy of the spring in set-up A will decrease and the elastic potential energy of the spring in set-up B will increase.
The elastic potential energy of the spring in set-up A will increase and the elastic potential energy of the spring in set-up B will decrease.
