How will an object at rest be affected if multiple forces working on it are opposed but unbalanced?

Question

Responses:

The unbalanced forces will cause the object to produce a humming sound.

The mass of the object will decrease.

The acceleration of the object will increase.

Motion will be either created, stopped or changed.

Answer 1

If multiple forces working on an object at rest are opposed but unbalanced, the correct response is:

Motion will be either created, stopped, or changed.

When unbalanced forces act on an object, they result in a net force that will cause the object to accelerate, change direction, or come to a stop, depending on the direction and magnitude of the resultant force.

Answer 2

Two people collide on a busy city street. What information is needed to calculate the force one of the people exerts on the other person
Responses:

the location of the collision

the mass and acceleration of each person

the speed of each person

the velocity of each person

Answer 3

To calculate the force one person exerts on the other during a collision, the necessary information is:

the mass and acceleration of each person.

Using Newton's second law of motion (F = m * a), you'll need both the mass of the individuals and their acceleration at the moment of the collision to determine the force exerted during the impact.

Answer 4

A soccer ball rests on the ground in a stationary position. Which of the following best describes the forces acting on the ball
Responses:

balanced forces

accelerating forces

unequal forces

unbalanced forces

Answer 5

The best description of the forces acting on a stationary soccer ball resting on the ground is:

balanced forces.

In this case, the force of gravity pulling the ball downward is balanced by the normal force from the ground pushing upward. Since these forces are equal in magnitude and opposite in direction, they result in no net force acting on the ball, allowing it to remain at rest.

Answer 6

Two bowling balls of different masses collide while accelerating at 1.875 m/s 2
. The first ball, rolling to the right, weighs 7 kg. The second ball, rolling to the left, weighs 4 kg. What force does the bowling ball weighing 7 kg exert on the bowling ball weighing 4 kg
Responses:

7.5 N to the left

13.125 N to the right

3.73 N to the right

8.875 N to the right

Answer 7

To find the force that the 7 kg bowling ball exerts on the 4 kg bowling ball during the collision, we can use Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a):

\[ F = m \cdot a \]

Given the following:

• Mass of the first ball (m1) = 7 kg (this is the ball moving to the right)
• Mass of the second ball (m2) = 4 kg (this is the ball moving to the left)
• Acceleration (a) = 1.875 m/s²

We focus on the 7 kg ball exerting force on the 4 kg ball, thus we can use the mass of the 7 kg ball to calculate the force:

\[ F = m1 \cdot a = 7 , \text{kg} \cdot 1.875 , \text{m/s}^2 = 13.125 , \text{N} \]

Since the 7 kg ball is rolling to the right, but it exerts this force on the 4 kg ball which is rolling to the left, the force exerted by the 7 kg ball on the 4 kg ball will be directed to the left.

Therefore, the correct response is:

13.125 N to the left.