# Net Force Quiz - Learn Physics Concept

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The net force is the sum of forces acting on a particle or body. It gives particles the same acceleration as all those actual forces together as described by Newton's second law of motion. Understand the concept of net force better and learn interesting trivia with this quiz.

• 1.

### When people pull something in completely different directions, we say they are

• A.

Using equal forces

• B.

Using opposing (opposite) forces

• C.

Lifting

• D.

Resting

B. Using opposing (opposite) forces
Explanation
When people pull something in completely different directions, we say they are using opposing (opposite) forces. This means that the forces exerted by each person are in opposite directions, canceling each other out. This can result in a tug-of-war situation where neither side is able to move the object because the forces are equal in magnitude but opposite in direction.

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• 2.

### The net force on this car is equal to zero

• A.

True

• B.

False

B. False
Explanation
The net force on the car is not equal to zero because if it were, the car would not be able to accelerate or decelerate. In order for the car to move, there must be a nonzero net force acting on it.

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• 3.

### The net force acting on this car is

• A.

7N

• B.

10N

• C.

17N

• D.

3N

D. 3N
Explanation
The net force acting on the car is 3N. This means that the total force acting on the car in all directions is 3N. It could be a combination of forces pushing or pulling the car in different directions, but when they are all added up, the result is a net force of 3N.

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• 4.

### The net force on this car is acting in the righthand direction -->

• A.

True

• B.

False

A. True
Explanation
The net force on the car is acting in the righthand direction because the statement implies that there is a force acting on the car in the direction towards the right. This means that the sum of all the forces acting on the car in that direction is greater than the forces acting in the opposite direction. Therefore, the car will experience a net force in the righthand direction.

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• 5.

### This car will move...

• A.

No where (stationary/stays still)

• B.

To the right -->

• C.

• D.

Option 4

B. To the right -->
Explanation
The correct answer is "to the right -->" because option 4 indicates that the car will move in the right direction.

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• 6.

### What would we call the force marked '10N'?

• A.

Friction

• B.

Thrust

• C.

Lift

• D.

Air resistance

• E.

Gravity

B. Thrust
Explanation
Thrust is the correct answer because it refers to the force that propels an object forward. In this case, the force marked '10N' is likely the force of thrust, which is commonly associated with engines or propulsion systems. Friction is a force that opposes motion, lift is the force that allows objects to move upward, air resistance is the force that opposes the motion of objects through the air, and gravity is the force that attracts objects toward each other. None of these forces accurately describe the force marked '10N' except for thrust.

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• 7.

### The net force is the only force that equally counteracts the effect of original forces on the particle's movement.

• A.

True

• B.

False

A. True
Explanation
The net force refers to the overall force acting on an object, taking into account all the individual forces acting on it. In this case, the statement is saying that the net force is the only force that can completely cancel out the effects of the original forces on the particle's movement. This is true because the net force is the vector sum of all the forces, and if the net force is zero, then the particle will not accelerate and its movement will remain unchanged.

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• 8.

### Net force is the ______ sum of forces acting on a particle or body.

Vector
Explanation
The net force acting on a particle or body is the vector sum of all the individual forces acting on it. This means that the net force takes into account both the magnitude and direction of each force. By adding up all these vector quantities, we can determine the overall effect of the forces on the motion of the particle or body.

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• 9.

### A net force (i.e., an unbalanced force) causes an acceleration.

• A.

True

• B.

False

A. True
Explanation
An unbalanced force refers to a situation where the forces acting on an object are not equal in magnitude and opposite in direction, resulting in a net force. According to Newton's second law of motion, a net force acting on an object will cause it to accelerate. This means that if there is an unbalanced force acting on an object, the object will experience a change in its velocity, either in terms of speed or direction. Therefore, the statement "a net force (i.e., an unbalanced force) causes an acceleration" is true.

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