Forces
What type of force causes a ball thrown upward to return to the ground?
A. Magnetism
B. Gravity
C. Friction
D. Normal
What is . Gravity – Gravity pulls objects toward Earth’s surface.
What does a net force of 0 N mean?
A. The object speeds up
B. The forces are unbalanced
C. The object’s motion does not change
D. The object falls due to gravity
What is C. The object’s motion does not change – Balanced forces cause no motion change
Is Walking an example of Newtons 3rd Law?
What is "Yes"
1. What type of force occurs when two surfaces rub against each other?
A. Gravity
B. Friction
C. Normal
D. Applied
What is B. Friction – Friction resists motion between two surfaces.
6. What is the force that pulls all objects toward each other?
A. Friction
B. Gravity
C. Applied
D. Normal
What is B. Gravity – It acts between any two masses.
When a volleyball player spikes a ball, what type of force is applied?
A. Gravity
B. Applied
C. Normal
D. Friction
What is : B. Applied – The player applies force to the ball to move it.
What happens to the gravitational force between two objects as the distance between them increases?
A. It increases
B. It decreases
C. It stays the same
D. It reverses direction
What is B. It decreases – Gravitational pull weakens as distance increases.
What can Newtons 3rd Law also be called
What is "action and reaction Law"
2. Which of the following is an example of a balanced force?
A. A book resting on a table
B. A car speeding up
C. A ball rolling downhill
D. A rocket launching
What is A. A book resting on a table – Gravity and normal force are equal and opposite
When an object is moving at a constant speed in a straight line, what does that indicate about the forces acting on it?
A. They are balanced
B. They are unbalanced
C. Friction is greater
D. Gravity is stronger
What Is A. They are balanced – Constant motion means no net force.
. Which of the following is a noncontact force?
A. Friction
B. Normal
C. Gravity
D. Applied
What is C. Gravity – Gravity acts at a distance, without contact.
10. Which factor increases the gravitational pull between two objects?
A. Larger mass
B. Smaller distance
C. Greater friction
D. Both A and B
What is D. Both A and B – More mass and shorter distance = stronger gravity
A boy sitting on a frictionless sled throws a 2 kg snowball forward with a force of 10 N. What happens to the sled and the boy?
A) The sled moves forward because the snowball moves forward.
B) The sled does not move because the snowball is too light.
C) The sled moves backward because the snowball exerts an equal and opposite force on the boy.
D) The sled moves forward, but the boy stays in place.
What is C) The sled moves backward because the snowball exerts an equal and opposite force on the boy.
What happens when an unbalanced force acts on an object?
A. It stays still
B. It changes motion
C. It stops all forces
D. It loses mass
What is B. It changes motion – Unbalanced forces cause acceleration or direction change.
8. A person drops a ball from a height. Which statement best describes its motion?
A. The ball moves at constant speed
B. Gravity causes it to accelerate downward
C. Air resistance causes it to stop midair
D. It moves upward first
What is B. Gravity causes it to accelerate downward – Gravity pulls the ball toward Earth.
A magnet attracts a metal paperclip. What type of force is this?
A. Contact, push
B. Noncontact, pull
C. Contact, pull
D. Frictional, contact
What is B. Noncontact, pull – Magnetism pulls metal objects without touching.
11. According to Newton’s Third Law, when you push on the ground while running, the ground —
A. Exerts an equal and opposite push on you
B. Absorbs your energy
C. Does not exert any force
D. Pushes forward twice as hard
What is A. Exerts an equal and opposite push on you – Action–reaction forces are equal and opposite.
Why does your hand hurt when punching a wall even though you are the one applying force?
What is "the equal force applying to your hand"
Which force always acts opposite to the direction of motion?
A. Normal
B. Friction
C. Gravity
D. Applied
What is : B. Friction – It opposes motion to slow objects down.
When you jump on a trampoline, you get launched upwards, what Law is this?
What is "3rd Law"
Two ice skaters, Skater A (50 kg) and Skater B (70 kg), push off each other. If Skater A moves backward at 3 m/s, how fast does Skater B move?
A) 3 m/s
B) 2.14 m/s
C) 4.2 m/s
D) 1.5 m/s
What Is B) 2.14 m/s
A 40 kg student is on a frictionless cart. She pulls on a rope tied to a 60 kg crate on another cart, exerting a force of 120 N. Which of the following is true?
A) The crate pulls back with a smaller force because it is heavier.
B) The crate pulls back with the same 120 N force, but accelerates more slowly.
C) The crate does not pull back because it is heavier.
D) The student only moves if the crate moves first.
What is B) The crate pulls back with the same 120 N force, but accelerates more slowly.
What does Newtons 3rd Law State?
What is "For every action there is an opposite and equal reaction"
A soccer ball is kicked and rolls across grass, slowing down gradually. Which force is responsible?
A. Normal
B. Friction
C. Gravity
D. Magnetic
What is B. Friction – The grass provides resistance that slows the ball.
A 60 kg student is standing on a frictionless skateboard. She pushes a 20 kg box across the floor with a force of 30 N. According to Newton’s 3rd Law, which of the following statements is true?
A) The student exerts a force on the box, and the box exerts a smaller force back on the student because it has less mass.
B) The student exerts a force on the box, and the box exerts an equal and opposite force on the student, causing her to move backward.
C) The box does not exert any force on the student because it is lighter.
D) The student only moves if the box moves faster than she does.
B) The student exerts a force on the box, and the box exerts an equal and opposite force on the student, causing her to move backward.