24-25 Forces and Newton Laws REVIEW

Front

What is inertia?

Back

Inertia is the property of an object to resist changes in its state of motion. All objects with mass have inertia.

Front

What is the formula to calculate weight?

Back

Weight (W) is calculated using the formula W = mass (m) × gravitational acceleration (g).

Front

If the mass of an object is doubled while the force remains constant, what happens to the acceleration?

Back

The acceleration is halved (cut in half). This is based on Newton's second law, F = ma.

Front

What is the weight of a 15 kg object if g = 0.8 N/kg?

Back

The weight is 12 N, calculated as W = 15 kg × 0.8 N/kg.

Front

How do you find the force needed to accelerate an object?

Back

Use Newton's second law: F = m × a, where F is force, m is mass, and a is acceleration.

Front

What is the mass of an object that exerts a force of 60 N and accelerates at 4 m/s²?

Back

The mass is 15 kg, calculated using m = F/a = 60 N / 4 m/s².

Front

What does Newton's first law state?

Back

An object at rest stays at rest, and an object in motion stays in motion at constant velocity unless acted upon by a net external force.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, while mass is the amount of matter in the object. Weight = mass × gravitational acceleration.

Front

What happens to the acceleration of an object if the net force acting on it is increased?

Back

The acceleration increases, as per Newton's second law (F = ma).

Front

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

Back

The unit of force is the Newton (N).