Physics Sem 1 Review 1

Front

What is the acceleration of objects in a vacuum?

Back

In a vacuum, all objects fall with the same acceleration due to gravity, regardless of their mass.

Front

How does the force of gravity change with distance from the center of the Earth?

Back

The force of gravity decreases proportional to 1/r^2 as the distance r from the center of the Earth increases.

Front

What determines how far a projectile lands?

Back

The distance a projectile lands is influenced by its initial velocity, angle of launch, and the effects of gravity.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, which can be in the same direction as the velocity (speeding up) or in the opposite direction (slowing down).

Front

If a tractor is moving west and slows down, what is the direction of its acceleration?

Back

The direction of the tractor's acceleration is east, as it is slowing down.

Front

What is the mass of an object on the Moon compared to its mass on Earth?

Back

The mass of an object remains the same regardless of location; it is 48 kg on both Earth and the Moon.

Front

What is weight?

Back

Weight is the force of gravity acting on an object, calculated as weight = mass × acceleration due to gravity.

Front

What happens to the weight of an object when it is taken to the Moon?

Back

The weight of an object decreases on the Moon because the acceleration due to gravity is one-sixth that of Earth.

Front

What is the formula for gravitational force?

Back

The gravitational force between two masses is given by F = G(m1*m2)/r^2, where G is the gravitational constant.

Front

What is the significance of a vacuum in physics experiments?

Back

A vacuum eliminates air resistance, allowing for the study of motion and acceleration without external forces.