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in which situation are unbalanced forces acting on an object?

a. two people stand on opposite sides of a large tire. Both people pull the tire with equal fore
b. two people stand on the same side of a large tire. Both people pull the tire with equal force.
c. 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.
d. two people stand on opposite sides of a large tire. Both people push the tire with equal force.

9 answers

Unbalanced forces act on an object when the net force acting on that object is not zero. This usually occurs when the forces acting on the object are not equal in size and/or direction.

Let's analyze the options:

a. Two people stand on opposite sides of a large tire. Both people pull the tire with equal force.

  • This results in balanced forces because the forces are equal in magnitude and opposite in direction, resulting in no net force on the tire.

b. Two people stand on the same side of a large tire. Both people pull the tire with equal force.

  • This also results in balanced forces, as the net force remains zero.

c. 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.

  • This results in unbalanced forces because one person is applying a force in one direction (pushing) while the other is applying a force in the opposite direction (pulling), resulting in a net force.

d. Two people stand on opposite sides of a large tire. Both people push the tire with equal force.

  • Similar to option A, this results in balanced forces, as the push forces are equal in magnitude and opposite in direction.

Therefore, the situation where unbalanced forces are acting on an object is c.

what is intertia?

a. the speed and direction of an object in motion.
b. the motion of an object
c. an object's resistance to a change its motion
d. a force that acts on an object at rest.

Inertia is defined as an object's resistance to a change in its state of motion. This means that an object at rest will stay at rest, and an object in motion will continue in motion at a constant speed and in a straight line unless acted upon by an external force.

Therefore, the correct answer is c. an object's resistance to a change in 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?

a. inertia prevents the force of the car from acting on the balloon.
b. the motion of the car creates an unbalanced backward force on the balloon.
c. the force of inertia on the balloon balances the force from the motion of the car.
d. the car moves forward, while inertia keeps the balloon in place.

The observation that the balloon appears to move backward relative to the car when the car starts moving forward can be explained by the concept of inertia. The balloon has a tendency to remain in its state of rest due to its inertia, while the car, being propelled forward by its engine, is suddenly moving forward.

The best explanation for this situation is:

d. the car moves forward, while inertia keeps the balloon in place.

This means that the balloon doesn't have enough external force to move with the car right away, so it appears to move backward relative to the car as it accelerates forward.

which statement best explains why a paper airplane eventually falls to the ground?

a. inertia prevents new forces from acting on the airplane to keep it up.
b. the unbalanced forces of air resistance and gravity slow the airplane and pull it down.
c. the force from throwing the airplane loses strength as the airplane moves.
d. inertia slows the airplane and pulls it down.

The best explanation for why a paper airplane eventually falls to the ground is:

b. the unbalanced forces of air resistance and gravity slow the airplane and pull it down.

As the airplane flies, gravity acts downward on it, pulling it toward the ground, while air resistance acts against its motion. Eventually, the forces of air resistance and gravity create an unbalanced force that causes the airplane to lose altitude and eventually descend.

according to newton's first law, what potential impact can an unbalanced force have on an object in motion?

a. an unbalanced force can change both the object's direction and speed.
b. an unbalanced force can only change the object's direction.
c. an unbalanced force can only change the object's speed.
d. an unbalanced force will have no impact on an object in motion.

According to Newton's first law of motion, an object in motion will remain in motion at a constant velocity unless acted upon by an unbalanced force. When an unbalanced force acts on an object in motion, it can change both the object's speed and direction.

Therefore, the correct answer is:

a. an unbalanced force can change both the object's direction and speed.