Physics Semester 1 Review

Front

What happens to forces when a marble speeds up rolling down a ramp?

Back

The forces are unbalanced.

Front

How do you calculate the force acting on an object?

Back

Force (F) = mass (m) × acceleration (a). For example, a 5 kg object accelerating at 3 m/s² has a force of 15 N.

Front

Convert 0.75 liters to milliliters.

Back

0.75 liters = 750 mL.

Front

What is the formula for acceleration?

Back

Acceleration (a) = (final velocity - initial velocity) / time. For example, a roller coaster accelerating from 6.0 m/s to 70 m/s in 4 seconds has an acceleration of 16 m/s².

Front

What is the unit of mass?

Back

The unit of mass is kilograms (kg).

Front

What is the difference between balanced and unbalanced forces?

Back

Balanced forces do not cause a change in motion, while unbalanced forces cause an object to accelerate.

Front

What is the acceleration of an object if a net force of 20 N is applied to a mass of 4 kg?

Back

Acceleration (a) = Force (F) / mass (m) = 20 N / 4 kg = 5 m/s².

Front

What is the relationship between mass, weight, and gravity?

Back

Weight (W) = mass (m) × gravitational acceleration (g). On Earth, g is approximately 9.81 m/s².

Front

How do you convert grams to kilograms?

Back

To convert grams to kilograms, divide the number of grams by 1000. For example, 500 grams = 0.5 kg.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic Energy (KE) = 0.5 × mass (m) × velocity² (v²).