In which situation are unbalanced forces acting on an object? (1 point)
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 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. One person pushes the tire and the other pulls the tire with equal force.
What is inertia? (1 point)
a force that acts on an object at rest
an object's resistance to a change its motion
the speed and direction of an object in motion
the motion of an object
Inertia is an object's resistance to a change in its motion.
What is inertia? (1 point)
A. a force that acts on an object at rest
B. an object's resistance to a change its motion
C. the speed and direction of an object in motion
D. the motion of an object
B. 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)
A. The force of inertia on the balloon balances the force from the motion of the car.
B. The motion of the car creates an unbalanced backward force on the balloon.
C. The car moves forward, while inertia keeps the balloon in place.
D. Inertia prevents the force of the car from acting on the balloon.