Midterm 24-25 Review

Front

What is a 'snaky spring' used for in a classroom demonstration?

Back

A 'snaky spring' is a long elastic rope-like spring used to demonstrate wave properties.

Front

What should be avoided when demonstrating wave properties with a snaky spring?

Back

Releasing one end of the stretched spring.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic Energy (KE) = 0.5 * mass * velocity^2.

Front

If a ball has 17 J of kinetic energy and 25 J of mechanical energy, how do you find its height above the ground?

Back

Use the formula: Potential Energy (PE) = Total Mechanical Energy - Kinetic Energy. Then, PE = m * g * h.

Front

What is the gravitational force of the Sun on Earth in December compared to June?

Back

The gravitational force is slightly larger in December because Earth is closer to the Sun.

Front

What is the formula for calculating work done?

Back

Work (W) = Force (F) * Distance (d) * cos(θ), where θ is the angle between the force and the direction of motion.

Front

How much work is done on a 200-kg crate that is hoisted 2 m?

Back

3920 J (calculated using W = m * g * h, where g = 9.8 m/s²).

Front

What is the relationship between mass, height, and gravitational potential energy?

Back

Potential Energy (PE) = mass (m) * gravitational acceleration (g) * height (h).

Front

What safety measures should be taken during a demonstration involving a candle and sound?

Back

Dim the lights if necessary, but have everyone stay in their seats during the demonstration.

Front

What happens to the gravitational force between two objects as the distance between them increases?

Back

The gravitational force decreases as the distance increases.