Forces Test Review

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This is expressed as F = ma.

Front

What happens to the acceleration of an object if the mass increases while the force remains constant?

Back

The acceleration decreases. This is because acceleration is inversely proportional to mass when force is constant.

Front

Define inertia in the context of physics.

Back

Inertia is the property of an object to resist changes in its state of motion. It is directly proportional to the object's mass.

Front

What factors affect the gravitational force between two objects?

Back

The gravitational force between two objects depends on their masses and the distance between them.

Front

If an object has a mass of 10 kg and experiences a force of 20 N, what is its acceleration?

Back

Acceleration = Force / Mass = 20 N / 10 kg = 2 m/s².

Front

What is the formula to calculate weight?

Back

Weight (W) is calculated using the formula W = mg, where m is mass and g is the acceleration due to gravity (approximately 9.8 m/s² on Earth).

Front

How does mass affect the acceleration of an object when the same force is applied?

Back

The greater the mass of the object, the less acceleration it will have when the same force is applied.

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force is the Newton (N).

Front

What is the acceleration of a 25 kg box if a net force of 40 N is applied?

Back

Acceleration = Force / Mass = 40 N / 25 kg = 1.6 m/s².

Front

What is the weight of a 5 kg object on Earth?

Back

Weight = mass × gravity = 5 kg × 9.8 m/s² = 49 N.