Question

Please help ASAP.

Study the scenario.

An object is at rest. At five seconds, someone comes over and pushes the object forward with a force of 10 N. After it is pushed, the object is still at rest.

Which of the following choices describes how static equilibrium could have been achieved when the object was pushed?
1)
A backward force of 10 N was exerted on the box at exactly five seconds so that the forces were balanced, and the object remained at rest.
2)
A force greater than 10 N was exerted straight down on the object, countering the normal force.
3)
A force of exactly 10 N was exerted straight down on the object, countering the normal force.
4)
A force greater than 10 N was exerted in a forward direction on the object at exactly five seconds so that the forces were balanced, and the object remained at rest.

Answer 1

Answer:

1

Explanation:

a force of 10 N to the left at exactly 5 seconds

Answer 2

The correct answer is option (1) A backward force of 10 N was exerted on the box at exactly five seconds so that the forces were balanced, and the object remained at rest.

EXPLANATION

• According to the second law of motion, an object will continue to stay at rest or will continue to be in a state of motion unless an external force acts on it.
• In the given situation the object stays in a state of rest even after applying an external force because the magnitude of the applied external force was smaller than the static friction between the surface of the object and the ground which is exerted in the opposite direction of the applied force.
• We know that the maximum value of the static friction is equal to the product of the coefficient of static friction and the Magnitude of the normal force applied to the object.
• If the force applied is smaller than the frictional force, a force of equal magnitude (10N) and in opposite direction comes into action which resists the object to change its state of motion of rest.

Hence, The correct answer is an option(1)

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