Forces and Newton's Laws of Motion

Quiz by Michelle Haag

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26 questions
• Q1
Where on a magnet is the magnetic field the strongest?
in the middle
it is the same strength on the entire magnet
at the two poles
only at the north pole
120s
• Q2
What is the net force in a tug of war game if one team pulls 1000 N to the left and the other team pulls 1200 N to the right?
2200 N left
200 N left
200 N right
2200 N right
120s
• Q3
After rubbing a rubber brush on wool, you are able to use the brush to pick up small strips of paper. What causes the paper to be attracted to the brush?
rubbing the brush with the wool give the brush an electric charge that is the same as the electric charge on the paper
rubbing the brush with wool gives the brush an electric charge that is weaker than the electric charge on the paper
rubbing the brush with wool gives the brush an electric charge that is stronger than the electric charge on the paper
rubbing the brush on wool gives the brush an electric charge that is opposite of the electric charge on the paper
120s
• Q4
If a chair is sitting still on the floor, what does that tell us about the forces acting on the chair?
The force of gravity is greater than the force of friction because the chair is not moving.
The force of friction is greater than the force of gravity because the chair is not moving.
The forces are unbalanced because the chair is not moving.
The forces are balanced because the chair is not moving.
120s
• Q5
Which of these is an example of Newton’s first law of motion?
A box will stay at rest until a force moves it.
A box pushes on the floor with a force, and the floor pushes back on the box with a force.
The harder I push a box the farther it will move.
120s
• Q6
What does Newton’s 2nd law tell us will happen to a shopping cart as more mass is added to it?
It will speed up and turn
It will slow down and continue in the same direction
It will slow down and turn
It will speed up and continue in the same direction
120s
• Q7
If you push a 10 kg box, a 20 kg box, and a 30 kg box each with an equal amount of force, which box will move farther?
The 30 kg box because it has more mass
They will all move the same distance because the amount of force was the same
The 10 kg box because it has less mass
The 20 kg box because it was pushed harder
120s
• Q8
If you throw a golf ball and a bowling ball and they both land 5 meters away from where they were thrown, what does that tell you about the amount of force used to throw the balls?
The bowling ball was thrown with more force because you have to use more force to move something with more mass.
The golf ball was thrown with more force because it is easier to move something with less mass.
They were thrown with the same amount of force because they went the same distance.
30s
• Q9
If I pull on a door with 50 N of force to open it, how much force is applied to my hand by the door as I pull on it?
25 N
100 N
50 N
0 N
120s
• Q10
Which of these describes a pair of action-reaction forces while you are swimming?
The force of your hands and legs pushing on the water, and the force of the water pushing back on your hands and legs.
The force of gravity on your body, and the force of the water pushing on you.
The force of your hands and legs pushing on the water, and the force of gravity pulling you down.
120s
• Q11
One student rubs a balloon against his hair several times. Another student passes a comb through her hair several times. The students place the comb near the balloon and observe that the comb repels the balloon. Which is the most likely reason the comb is able to repel the balloon?
the balloon and the comb have the same electrical charge
the balloon has a positive charge and comb is neutral.
the balloon and comb have opposite charges.
the balloon has a negative charge and the comb is neutral.
120s
• Q12
The gravitational force on an object on the Moon is 1/6 that of the same object on Earth. Why is gravity on the moon less than gravity on Earth?
because Earth is rotating at a faster rate than the Moon is rotating
because the distance from Earth to the object has increased
because the mass of the Moon is less than the mass of Earth
because the pull on the object from Earth counteracts the pull from the Moon
120s
• Q13
What happens when the north pole on one magnet is moved close to the south pole on another magnet?
a repulsive force causes the magnets to move back and forth
an attractive force causes the magnets to move towards each other
an attractive force causes the magnets to move back and forth
a repulsive force causes the magnets to move away from each other
120s
• Q14
What does Newton’s 1st law of motion tell us about the expected motion of a kickball rolling across the floor?
The ball will roll faster if it has less mass.
The ball speeds up as it rolls across the floor.
The ball will keep rolling until a force stops it.
120s
• Q15
Which of these would cause an electromagnet to become weaker?
using a bigger nail
using a bigger battery
using more wire
using a smaller battery
120s

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