# Explain how factors such as gravity, friction, and change in mass affect the motion of objects.

## Quiz by Sahnye Milton

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15 questions
• Q1
What does the force of gravity do?
It pulls objects toward each other
It makes objects float
It pushes objects away from each other
It turns objects to dust
30s
• Q2
What is friction?
A type of gravity
A force that resists the motion of objects
The sound made when two objects rub together
The heat produced when two objects collide
30s
• Q3
If you slide a book across a table, what force makes it eventually stop?
Electrical force
Gravity
Friction
Magnetic force
30s
• Q4
What would happen if the force of gravity suddenly disappeared?
Things would become invisible
Things would turn to dust
Things would fall down faster
Things would float away
30s
• Q5
Why can't we walk easily on a slippery road?
Because of magnetic force
Because of more friction
Because of less friction
Because of increased gravity
30s
• Q6
Why do we slide on icy or wet surfaces?
Because of reduced friction
Because of reduced gravity
Because of increased friction
Because of increased gravity
30s
• Q7
What helps a car slow down when you apply the brakes?
Magnetic force
Friction
Gravity
Electric force
30s
• Q8
Which force keeps us from slipping while walking?
Magnetic force
Friction
Buoyancy
Gravity
30s
• Q9
What would life be like if there was no gravity on earth?
We could run faster
We would float instead of walk
We would be able to fly
We would be stronger
30s
• Q10
What is the force that pulls objects towards the center of the Earth?
Gravity
Friction
Air
Magnetism
30s
• Q11
What force causes a ball to come back down after being thrown into the air?
Gravity
Magnetism
Friction
Air resistance
30s
• Q12
What is a balanced force?
Forces that have no direction
Forces that are unequal in size
Forces that are equal in size and opposite in direction
Forces that are equal in size and same in direction
30s
• Q13
Which of the following is an example of a balanced force?
Two people pushing a box from opposite sides with equal force
A car accelerating on a flat road
A person lifting a heavy object off the ground
A soccer ball being kicked into the goal
30s
• Q14
What is the result of a balanced force on an object?
The object accelerates
The object changes its shape
The object stops moving
The object stays at rest or continues to move at a constant speed
30s
• Q15
What is the net force when two balanced forces act on an object?
The net force is halved
The net force is zero
The net force is doubled
The net force is multiplied
30s

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