Chapter 3 Force and motion

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = m × v, where p is momentum, m is mass, and v is velocity.

Front

What is the unit for momentum?

Back

The unit for momentum is kg x m/sec.

Front

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

Back

According to Newton's second law, force (F) is equal to mass (m) multiplied by acceleration (a), expressed as F = m × a.

Front

What is the unit for force?

Back

The unit for force is Newton (N), which is equivalent to kg × m/sec².

Front

What is weight?

Back

Weight is the force exerted by gravity on an object, calculated as the product of mass and gravitational acceleration (W = m × g).

Front

What is the gravitational acceleration on Earth?

Back

The gravitational acceleration on Earth is approximately 9.81 m/sec².

Front

How do you calculate the weight of an object?

Back

Weight can be calculated using the formula W = m × g, where W is weight, m is mass, and g is gravitational acceleration.

Front

What is the unit for velocity?

Back

The unit for velocity is m/sec.

Front

What happens to a person's speed on a skateboard when they throw a bowling ball?

Back

According to the law of conservation of momentum, the person's speed will change in the opposite direction to the bowling ball's throw.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.