PHY120 Midterm 2024

Front

What happens to the velocity of a baseball as it rises in the air?

Back

The velocity decreases.

Front

What is the speed of a freely falling object after 5 seconds if it starts from rest?

Back

50 m/s.

Front

In an experiment on plant growth, what is the independent variable when different liquids are used?

Back

The type of liquid.

Front

If Nellie Newton weighs 440 N and hangs from a swing, how much weight does each rope support?

Back

220 N.

Front

Why do a paper and a rock fall at different rates?

Back

Air resistance.

Front

Define velocity in the context of motion.

Back

Velocity is the speed of an object in a given direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What is gravitational acceleration near the Earth's surface?

Back

Approximately 9.81 m/s².

Front

Explain the concept of independent and dependent variables in an experiment.

Back

The independent variable is manipulated, while the dependent variable is measured to see the effect of the independent variable.

Front

What is air resistance and how does it affect falling objects?

Back

Air resistance is a force that opposes the motion of an object through air, affecting its acceleration and speed.