U3 Forces and Motion POSTTEST 2024
Quiz by Amanda Rogers
Feel free to use or edit a copy
includes Teacher and Student dashboards
Measures 10 skills from
- edit the questions
- save a copy for later
- start a class game
- automatically assign follow-up activities based on students’ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet
- Q 1/25Score 0
The graph shows the distance an object travels over time. Which answer correctly describes the object's motion during each interval of time?
29
- Q1
The graph shows the distance an object travels over time. Which answer correctly describes the object's motion during each interval of time?
300sS8P3a - Q2
In which time interval was the object speeding up?
between 8 s and 10 s
between 6 s and 8 s
between 2 s and 4 s
between 0 s and 2 s
300sS8P3a - Q3
Hector went to the grocery store by heading due north at 3 m/s, then turning east and continuing at the same speed for another three blocks. Which of the following is true about Hector's velocity?
Hector's velocity did not change because his direction did not change.
Hector's velocity changed because his speed changed.
Hector's velocity did not change because his speed did not change.
Hector's velocity changed because his direction changed.
300sS8P3a - Q4
A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why this occurred?
The train ran out of momentum.
The opposing force of friction stopped the train.
The force of gravity slowed the train until it stopped.
The natural state of the train is not to be in motion.
300sS8P3b - Q5
The Smith family is traveling in their car at 50 km/h due east. Mr. Smith is using cruise control to maintain a constant speed. Describe the net force acting on the Smith car.
Net forces are unbalanced.
Net force is positive and to the east.
Net force equals zero.
There is no way to determine net force.
300sS8P3b - Q6
Brad and Erin decide to have a tug of war contest. Erin pulls the rope with all her might and so does Brad. Sadly, Brad only pulls with half the force that Erin pulls with.
Since the forces are unbalanced the rope will move towards Erin. Using Newton's first law of motion as a model, explain how Brad could keep from losing the tug of war.
Make the rope longer so Brad can get a better grip.
Ask Erin to let go of the rope.
Let Sarah, who pulls just as hard as Brad, team up with Erin to pull the rope together.
Let Sarah, who pulls just as hard as Brad, team up with him to pull the rope together.
300sS8P3b - Q7
Your teacher was given an apple by a student trying to get on her good side. It sits on her desk the whole year, not moving.
You know that, if the apple were to roll off the desk, it would fall to the ground. So what is keeping the apple motionless on the desk?
The downward force of gravity on the apple is balanced by an equal but opposite force on the apple by the teacher.
The downward force of gravity on the apple is balanced by a larger force on the apple by the desk.
The downward force of gravity on the apple is balanced by an equal but opposite force on the apple by the desk.
Once placed on the desk, gravity is no longer acting on the apple.
300sS8P3b - Q8
The image above shows two opposite forces acting on a rolling cart, what can we say is true about the effect of the forces on the cart?
It cannot be determined because one man is taller than the other.
It cannot be determined without knowing which man is stronger.
The forces are unbalanced, and net force on the cart moves it to the left.
The forces are unbalanced, and net force on the cart moves it to the right.
300sS8P3b - Q9
Consider the four free-body diagrams. Free-body diagrams are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation. Do any of the free-body diagrams indicate motion? If yes, which one(s). Explain.
No. In each case, the forces are balanced.
You cannot tell if there is any motion. You can only determine how much force is acting on the objects.
Yes. In B and D. In both cases, there is a net force.
In B, there is a net force to the left; in D there is a net force upward.
Yes. In B the book is slowing down because of the friction force opposing motion.
300sS8P3b - Q10
Imagine you are on the top of a mountain with four basketballs. The mass of the four basketballs are 100 kilograms, 200 kilograms, 300 kilograms, and 400 kilograms. If the basketballs rolled down the hill, which one would supply the greatest force at the bottom of the mountain (assuming that their velocities were equal at the bottom of the mountain)?
400 kilogram basketball
100 kilogram basketball
300 kilogram basketball
200 kilogram basketball
300sS8P3c - Q11
Mutt and Jeff are running along a path each pushing a cart loaded with rocks. If Mutt's wagon has a mass two times greater than Jeff's and they want to stay together, arriving at their destination at the same time, what must happen?
Jeff should slow down so Mutt can catch up.
Mutt and Jeff will use the same force, but Mutt will take bigger steps.
Mutt must use twice as much force to push his cart.
Mutt must use half as much force to push his cart.
300sS8P3c - Q12
Meg and Rachel each have bowling balls with the same mass. They both roll them as hard as they can and then measure the speed of the balls.
Meg's ball and Rachel's ball were measured to have the exact same speed.
What do you know about the forces applied by the girls?
They applied an equal amount of force.
Rachel applied more force than Meg.
Meg applied more force than Rachel.
They applied almost the same amount of force.
300sS8P3c - Q13
Kimberly, Alex, and Fernando built small sailboats in science class. Their boats have the following weights:
Kimberly: 150 grams
Alex: 175 grams
Fernando: 200 grams
Think about how much force is needed to move each boat. Which correctly lists the boats in order from the most to least amount of force needed to move them?
Fernando, Alex, Kimberly
Alex, Kimberly, Fernando
Kimberly, Alex, Fernando
Kimberly, Fernando, Alex
300sS8P3c - Q14
It takes more force to accelerate the Iron Man on the left than the Iron Man on the right because the Iron Man on the left has more mass. This best describes
Newton's third law, the law of action-reaction
Newton's first law, the law of inertia
Newton's second law, the law of acceleration
The law of universal gravitation
300sS8P3b - Q15
An automobile you are riding in suddenly stops, but you continue to go forward.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Gravitational Force
300sS8P3b
