---

Question 1:

What is an applied force?

A) A force applied by a person.
B) A force applied by a machine.
C) A force applied externally to an object.
D) A force applied at an angle to an object.

Show Answer

Explanation: The correct answer is C) A force applied externally to an object. An applied force is a force that is exerted on an object by another object or source from outside the system under consideration. It can be applied by a person, a machine, or any external agent.

---

Question 2:

What is tension?

A) The force exerted by a string or rope.
B) The force exerted by a compressed or stretched spring.
C) The force exerted by a magnetic field.
D) The force exerted by a fluid.

Show Answer

Explanation: The correct answer is A) The force exerted by a string or rope. Tension is the pulling force exerted by a string, rope, cable, or any flexible connector. It acts along the length of the string or rope and is always directed away from the object to which the string or rope is attached.

---

Question 3:

What is the direction of the tension in a rope attached to a hanging object?

A) Downward, towards the ground.
B) Upward, away from the ground.
C) Sideways, perpendicular to the ground.
D) It depends on the weight of the hanging object.

Show Answer

Explanation: The correct answer is B) Upward, away from the ground. In the case of a hanging object, the tension in the rope is directed upward, away from the ground. This upward tension balances the downward force due to the weight of the hanging object, resulting in static equilibrium.

---

Question 4:

What happens to the tension in a rope when two people pull on it with equal forces in opposite directions?

A) The tension increases.
B) The tension decreases.
C) The tension remains the same.
D) The tension depends on the mass of the rope.

Show Answer

Explanation: The correct answer is C) The tension remains the same. When two people pull on a rope with equal forces in opposite directions, the tension in the rope remains the same. The tension in each segment of the rope balances the force exerted by the other person, resulting in a constant tension throughout the rope.

---

Question 5:

What can be said about the tension in a massless string connected to a hanging object?

A) The tension is zero.
B) The tension is equal to the weight of the object.
C) The tension is greater than the weight of the object.
D) The tension is less than the weight of the object.

Show Answer

Explanation: The correct answer is B) The tension is equal to the weight of the object. In the case of a massless string or idealized string, the tension in the string is equal to the weight of the hanging object. This is due to the fact that the tension in the string provides the upward force needed to balance the downward force of gravity on the object, resulting in static equilibrium.