Physics-Semester 1 Final Review

Front

What is the principle of conservation of momentum?

Back

The total momentum of a closed system remains constant before and after a collision, provided no external forces act on it.

Front

What does the speedometer in a car measure?

Back

The speedometer measures the instantaneous speed of the vehicle.

Front

What does Newton's 1st Law state?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

Front

Which equation relates final velocity, initial velocity, acceleration, and time?

Back

Vf = Vi + at

Front

What is the reaction force when you push against a wall with 100 N of force?

Back

The wall pushes back on you with 100 N of force.

Front

Define instantaneous speed.

Back

Instantaneous speed is the speed of an object at a specific moment in time.

Front

What is the difference between average speed and instantaneous speed?

Back

Average speed is the total distance traveled divided by the total time taken, while instantaneous speed is the speed at a particular moment.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the formula for calculating distance when acceleration is constant?

Back

X = (1/2)(g)(t^2) where g is acceleration due to gravity.

Front

What does the term 'net force' mean?

Back

Net force is the vector sum of all the forces acting on an object.