Chapter 12 Review

Front

What is the effect of the moon's gravitational field on an astronaut's weight compared to Earth?

Back

Astronauts weigh about 1/6 of their weight on Earth due to the moon's gravitational field being about 1/6 that of Earth's.

Front

What is the formula for gravitational force between two objects?

Back

The gravitational force is given by F = G * (m1 * m2) / r^2, where G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.

Front

What happens to gravitational force if the distance between two objects is doubled?

Back

The gravitational force becomes 4 times smaller.

Front

What is the value of 'g' (acceleration due to gravity) on Earth?

Back

The value of 'g' on Earth is approximately 9.8 m/s².

Front

If two objects are dropped from the same height, how do their weights affect the time it takes to hit the ground?

Back

Both objects will hit the ground at the same time if air resistance is ignored, regardless of their weights.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as weight = mass * g, where g is the acceleration due to gravity.

Front

How does gravitational force change with mass?

Back

Gravitational force is directly proportional to the masses of the objects; as mass increases, gravitational force increases.

Front

What is a free body diagram?

Back

A free body diagram is a graphical representation used to visualize the forces acting on an object.

Front

What does a force of 50 N to the right indicate in a free body diagram?

Back

It indicates that there is a net force of 50 Newtons acting in the right direction on the object.

Front

What is the significance of ignoring air resistance in physics problems?

Back

Ignoring air resistance simplifies calculations and allows for the analysis of motion under ideal conditions.