Forces and Motion Quiz

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Questions and Answers

What effect does a force have on an object?

It can change the state of motion or shape of the object. (correct)
It can only stop the motion of the object.
It purely increases the speed of the object.
It can only change the direction of the object.

Which of the following is NOT an example of applying force?

Keeping an object stationary. (correct)
Pulling a rope.
Pushing a shopping cart.
Hitting a baseball with a bat.

What can a force do to the shape of an object?

It can only enlarge the object.
It has no effect on the shape or size of the object.
It can change the shape but not the size.
It can change both the shape and size of the object. (correct)

Which scenario demonstrates a force changing an object's motion?

A child pushing their friend on a swing. (A) Signup and view all the answers

Which statement best represents the role of force in everyday life?

Force is necessary to start, stop, or change an object's motion. (D) Signup and view all the answers

What happens to a wooden block tied to strings when equal forces are applied?

The block does not move. (C) Signup and view all the answers

In which scenario will a box not move when being pushed?

When the pushing force is balanced by the frictional force. (D) Signup and view all the answers

According to Newton's First Law of Motion, what describes an object at rest?

It will stay at rest until acted upon by an unbalanced force. (B) Signup and view all the answers

What does inertia refer to in the context of motion?

The tendency of an object to maintain its state of motion. (B) Signup and view all the answers

If a marble is rolling down an inclined plane, what condition allows it to keep moving indefinitely?

If there are no opposing forces like friction. (C) Signup and view all the answers

What does inertia refer to in physics?

The tendency of an object to resist changes in its state of motion (C) Signup and view all the answers

How does mass affect inertia?

More mass means more inertia (A) Signup and view all the answers

What happens to the coins when the bottom coin is slid away?

The rest of the coins stay at rest (C) Signup and view all the answers

What observation can be made when flicking the card away from the coin under the tumbler?

The coin remains stationary in the tumbler (C) Signup and view all the answers

What is likely to happen when the tray with a water-filled tumbler is quickly turned?

The water spills out due to inertia (B) Signup and view all the answers

In terms of inertia, how would you compare a one-rupee coin to a five-rupee coin?

The five-rupee coin has greater inertia (C) Signup and view all the answers

Which of the following statements about inertia is false?

Greater mass means lesser inertia (D) Signup and view all the answers

According to the principles described, if you are in a moving vehicle and it turns, which statement is true?

You will fall in the direction opposite to the vehicle's turn (B) Signup and view all the answers

Which statement best describes the outcome of the children throwing the sandbag between them on separate carts?

The motion of the carts reflects the principle of action and reaction. (A) Signup and view all the answers

What does the First Law of Motion state regarding an object's state of motion?

An object will remain at rest or in uniform motion unless acted on by an unbalanced force. (D) Signup and view all the answers

In the activity with one cart having two children and the other one child, what does this setup demonstrate about force and acceleration?

The children experiencing more force will experience greater acceleration. (A) Signup and view all the answers

What role does friction play in the motion of objects?

Friction opposes the motion of objects, slowing them down. (D) Signup and view all the answers

How is mass related to inertia in the context of motion?

Mass is a measure of an object's inertia. (C) Signup and view all the answers

What is the formula for force as derived from the second law of motion?

$F = ma$ (A), $F = rac{m(v-u)}{t}$ (C) Signup and view all the answers

If an object has a mass of 10 kg and experiences an acceleration of 4 m/s², what is the magnitude of the applied force?

40 N (B) Signup and view all the answers

Which statement accurately describes momentum?

Momentum is dependent on both mass and velocity. (C) Signup and view all the answers

What happens to the momentum of an object when a constant force acts on it?

Momentum changes proportional to the applied force. (C) Signup and view all the answers

If an object is at rest and a net force is applied, what is the resultant acceleration dependent upon?

The object's mass and the magnitude of the force. (A) Signup and view all the answers

In the example given, if the force applied is doubled while maintaining the same mass and time, what will happen to the final velocity?

It will double. (D) Signup and view all the answers

What is the SI unit for force?

Newton (D) Signup and view all the answers

If an object with a momentum of 20 kg m/s gains an additional momentum of 5 kg m/s, what will its new momentum be?

25 kg m/s (A) Signup and view all the answers

Which mass requires a greater force to achieve the specified acceleration?

2 kg mass at 5 m/s² (B) Signup and view all the answers

What is the acceleration of a combined mass of 0.75 kg when a force of 5 N is applied?

6.67 m/s² (C) Signup and view all the answers

What is the force exerted by the brakes of a motorcar if it brings a 1000 kg vehicle from 30 m/s to a stop in 4 seconds?

-7500 N (C) Signup and view all the answers

In the context of the Third Law of Motion, which scenario demonstrates an action-reaction pair?

A person pushing against a wall (A) Signup and view all the answers

Which of the following concepts explains why equal forces do not always produce equal accelerations?

The masses of the objects may differ (B) Signup and view all the answers

If a force of 5 N produces an acceleration of 10 m/s², what is the mass being acted upon?

0.5 kg (A) Signup and view all the answers

What is the acceleration of a ball that starts from a velocity of 0.2 m/s and stops in 10 seconds?

-0.02 m/s² (C) Signup and view all the answers

Which statement best describes the force exerted by the table on the ball to bring it to rest?

It is opposite in direction to the motion of the ball (C) Signup and view all the answers

Which equation is used to calculate the braking force of a motorcar?

F = m \times \frac{(v - u)}{t} (B) Signup and view all the answers

What can be inferred about a system where one mass exerts a force on another mass?

The smaller mass may experience a greater acceleration (D) Signup and view all the answers

Flashcards

Force

A push, pull, or hit that can change the motion, shape, or size of an object.

Inertia

The tendency of an object to resist changes in its state of motion.