In which situation are unbalanced forces acting on an object?(1 point)
Responses
Two people stand on the same side of a large tire. One person pushes the tire and the other pulls the tire with equal force.
Two people stand on the same side of a large tire. One person pushes the tire and the other pulls the tire with equal force.
Two people stand on the same side of a large tire. Both people pull the tire with equal force.
Two people stand on the same side of a large tire. Both people pull the tire with equal force.
Two people stand on opposite sides of a large tire. Both people pull the tire with equal force.
Two people stand on opposite sides of a large tire. Both people pull the tire with equal force.
Two people stand on opposite sides of a large tire. Both people push the tire with equal force.
Two people stand on opposite sides of a large tire. Both people push the tire with equal force.
What is inertia?(1 point)
Responses
a force that acts on an object at rest
a force that acts on an object at rest
an object’s resistance to a change its motion
an object’s resistance to a change its motion
the motion of an object
the motion of an object
the speed and direction of an object in motion
the speed and direction of an object in motion
an object’s resistance to a change its motion
A balloon floats inside a stopped car. When the car starts moving forward, the balloon appears to move backward relative to the car. Which statement best explains this observation?(1 point)
Responses
Inertia prevents the force of the car from acting on the balloon.
Inertia prevents the force of the car from acting on the balloon.
The motion of the car creates an unbalanced backward force on the balloon.
The motion of the car creates an unbalanced backward force on the balloon.
The car moves forward, while inertia keeps the balloon in place.
The car moves forward, while inertia keeps the balloon in place.
The force of inertia on the balloon balances the force from the motion of the car.
The car moves forward, while inertia keeps the balloon in place.
Which statement best explains why a paper airplane eventually falls to the ground?(1 point)
Responses
The force from throwing the airplane loses strength as the airplane moves.
The force from throwing the airplane loses strength as the airplane moves.
Inertia slows the airplane and pulls it down.
Inertia slows the airplane and pulls it down.
The unbalanced forces of air resistance and gravity slow the airplane and pull it down.
The unbalanced forces of air resistance and gravity slow the airplane and pull it down.
Inertia prevents new forces from acting on the airplane to keep it up.
The unbalanced forces of air resistance and gravity slow the airplane and pull it down.
According to Newton's First Law, what potential impact can an unbalanced force have on an object in motion? (1 point)
Responses
An unbalanced force can only change the object's speed.
An unbalanced force can only change the object's speed.
An unbalanced force will have no impact on an object in motion.
An unbalanced force will have no impact on an object in motion.
An unbalanced force can only change the object's direction.
An unbalanced force can only change the object's direction.
An unbalanced force can change both the object's direction and speed.