24/25 Physics Midterm Review

Front

What are significant digits in a measurement?

Back

Significant digits consist of all the known digits plus one estimated digit.

Front

How do you calculate power output?

Back

Power output (P) is calculated using the formula P = Work / Time. For example, lifting a 1,000 N weight a distance of 2.0 meters in 0.5 seconds results in a power output of 4,000 W.

Front

What is an independent variable?

Back

The independent variable is the variable that is manipulated or changed on purpose in an experiment.

Front

How do you find the velocity in the X direction using trigonometric functions?

Back

To find the velocity in the X direction, you can use the cosine function if you have the angle and the hypotenuse.

Front

What is the formula for kinetic energy?

Back

The formula for kinetic energy (KE) is KE = (1/2)(m)(v²), where m is mass and v is velocity.

Front

What is the significance of the estimated digit in measurements?

Back

The estimated digit indicates the precision of the measurement, reflecting the uncertainty in the measurement process.

Front

What is the relationship between work, power, and time?

Back

Power is the rate at which work is done, calculated as Power = Work / Time.

Front

How do you calculate the work done when lifting an object?

Back

Work done (W) is calculated using the formula W = Force x Distance. For example, lifting a 1,000 N weight a distance of 2.0 meters results in 2,000 J of work.

Front

What is the difference between dependent and independent variables?

Back

The independent variable is manipulated by the experimenter, while the dependent variable is measured and responds to changes in the independent variable.

Front

What is the formula for calculating velocity?

Back

Velocity (v) is calculated as v = Distance / Time.