Force and Motion Creative Questions

Define Force.
Hint: Think about what causes an object to move or change its motion.

Answer explanation

Answer: Force is a push or a pull on an object that causes it to change speed, direction, or shape. Explanation: Force is the fundamental concept in physics that describes any interaction that, when unopposed, will change the motion of an object.

What is inertia and how does it relate to motion?
Hint: Inertia is a property of matter. How does it affect an object at rest or in motion?

Answer explanation

Answer: Inertia is the tendency of an object to resist changes in its state of motion. Explanation: It explains why an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

List two examples of action-reaction pairs from everyday life.
Hint: Remember, for every action, there is an equal and opposite reaction.

Answer explanation

Answer: Example 1: When you sit in a chair, your body exerts a downward force on the chair, and the chair exerts an upward force on your body. Example 2: When you push against a wall, the wall pushes back against you with equal force. Explanation: According to Newton's Third Law, for every action, there is an equal and opposite reaction.

Explain the difference between mass and weight.
Hint: One is the amount of matter in an object, and the other is the force exerted by gravity on that object.

Answer explanation

Answer: Mass is the amount of matter in an object, and it remains constant regardless of location. Weight is the force exerted by gravity on that mass and can vary depending on the gravitational field. Explanation: Weight is dependent on gravity, whereas mass is intrinsic to the object.

How does friction affect motion? Give an example.
Hint: Think about how surfaces interact when they slide against each other.

Answer explanation

Answer: Friction opposes the motion of objects. For example, when you slide a book across a table, friction between the book and the table slows the book down. Explanation: Friction is a force that resists the relative motion or tendency to such motion of two surfaces in contact.

Calculate the force required to accelerate a 10 kg object at 2 m/s².
Hint: Use the formula F=m×a.

Answer explanation

Answer: 20 N ( �=10 kg×2 m/s2F=10kg×2m/s2 ) Explanation: The force is calculated by multiplying the mass with the acceleration.

A car slows down from 80 km/h to a stop in 5 seconds. What is its acceleration?
Hint: First, convert the speed to m/s, then use a=Δv/Δt.

Answer explanation

If the gravitational force on Earth is 9.8 m/s², what is the weight of a 50 kg object?

Hint: Weight is calculated as Weight=mass×gravity.

Answer explanation

A force of 20 N acts on an object and causes an acceleration of 4 m/s². What is the mass of the object? Hint: Rearrange the formula F=m×a to find the mass.

Answer explanation

Find the net force when two forces of 5 N and 3 N act in the opposite direction.

Hint: When forces act in opposite directions, they subtract.

Answer explanation

Answer: 2 N in the direction of the larger force. Explanation: When forces act in opposite directions, they are subtracted from one another.