Force Quiz Review Practice

Mia and Olivia are playing baseball. This time, Mia swings at the baseball with even more force than before! What do you think will happen to the ball after Mia's powerful swing?

• • The ball will go slower and in the opposite direction it was thrown.

• • The ball will go faster and in the same direction it was thrown.

• • The ball will go faster and in the opposite direction it was thrown.

• • The ball will go slower and in the same direction it was thrown.

Answer explanation

Mia's powerful swing applies more force to the ball, causing it to accelerate. Since she hits it with greater force, the ball will move faster and in the opposite direction from where it was thrown.

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Liam and Charlotte are having an epic tug-of-war! Based on the forces shown, who will win, or will it be a tie? EXPLAIN your answer.

• Equal/Balanced forces, no motion, no one wins/tie

• Unequal/Unbalanced forces, motion to left, green shirt wins

• Unequal/Unbalanced forces, motion to right, red shirt wins

Answer explanation

Liam and Charlotte are exerting equal forces on each other, resulting in balanced forces. Since there is no net force acting on the system, there is no motion, leading to a tie.

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Kai, Mason, and Hannah are playing basketball. After a fun game, the ball is just sitting still on the ground, waiting for the next round. Are the forces on the ball balanced or unbalanced, and is there motion or no motion?

• Forces are balanced, and there is no motion.

• Forces are unbalanced, and there is motion.

• Forces are balanced, and there is motion.

• Forces are unbalanced, and there is no motion.

Answer explanation

The ball is sitting still, indicating no motion. Since it is not moving, the forces acting on it must be balanced, resulting in no net force. Therefore, the correct choice is: Forces are balanced, and there is no motion.

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Noah and Sophia are having a friendly tug-of-war with a box! Noah pulls the box to the left with a force of 3 N, while Sophia pulls to the right with a force of 5 N. Which way will the box move and why?

• • The box will move to the left due to the unequal forces.

• • The box will move to the right due to the unequal forces.

• It will not move because the forces are balanced.

• It will move upwards due to an upward force.

Answer explanation

The box will move to the right because Sophia's force of 5 N is greater than Noah's force of 3 N. The net force is 2 N to the right, causing the box to move in that direction.

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Nora, William, and Isla are racing toy cars in different places! Where do you think their car would zoom the most because of unbalanced forces?

• The top of a steep hill

• On a flat road

• In a parking lot

• On a bumpy road

Answer explanation

The top of a steep hill has unbalanced forces due to gravity pulling the car downwards, causing it to accelerate and zoom faster compared to the other options, where forces are more balanced.

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Ava, Mia, and Michael are setting up a balloon rocket race in their classroom! Which science tools should they use to measure how far and how fast their balloon rockets travel?

• Meter Stick/Ruler and stopwatch

• Thermometer and barometer

• Microscope and telescope

• Balance and graduated cylinder

Answer explanation

To measure the distance traveled by the balloon rockets, a meter stick or ruler is needed. A stopwatch is essential for timing how long it takes for the rockets to travel, allowing them to calculate speed.

Ethan and Anika are conducting an experiment, but they can only choose one independent variable to test. Why is it important for them to stick to just one?

• To ensure that the results are due to the independent variable alone

• To make the experiment more complex

• To increase the number of variables affecting the outcome

• To confuse the results

Answer explanation

It is important for Ethan and Anika to stick to just one independent variable to ensure that the results are due to that variable alone. This helps in accurately determining the effect of the independent variable on the outcome.

Michael, Benjamin, and Rohan are testing how different surfaces affect the force measured on a spring scale. Which change to the surface would make the spring scale show a higher force?

• By increasing friction

• By decreasing friction

• By changing the angle of the surface

• By altering the material of the spring

Answer explanation

Increasing friction between the surface and the object increases the resistance to motion, which results in a higher force being measured on the spring scale. Thus, the correct choice is to increase friction.

Scarlett, Grace, and Nora are conducting a science experiment. What are constant variables in their experiment?

• Variables that change during the experiment

• Variables that remain the same throughout the experiment

• Variables that are measured in the experiment

• Variables that are not important in the experiment

Answer explanation

Constant variables are those that remain unchanged throughout the experiment. They are essential for ensuring that the results are valid and reliable, allowing the experimenters to focus on the effects of the changing variables.

Aiden, Michael, and Samuel are curious about how hard it is to pull a dictionary across the table. First, they use a spring scale to pull just the 1 kg dictionary. Then, they stack a 2 kg box of marbles on top and try again! This experiment can be best used to determine...

• how the mass of a box of marbles affects the mass of a dictionary

• how mass affects the force needed to move objects

Answer explanation

The experiment shows how adding mass (the box of marbles) increases the force needed to pull the dictionary. Thus, it effectively demonstrates how mass affects the force required to move objects.

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