Science STAAR- Physics Review

Front

What is the definition of velocity?

Back

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

Front

What happens to an object at rest when balanced forces act on it?

Back

The object will remain at rest.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

If an object is moving and the forces acting on it are balanced, what will happen?

Back

The object will travel in the same direction at the same velocity.

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

How do you calculate the speed of a car that travels 300 km in 2.5 hours?

Back

Speed = 300 km / 2.5 hr = 120 km/hr.

Front

What is an example of an object with constant velocity?

Back

A car traveling at 60 km/hr in a straight line.

Front

What does it mean for forces to be balanced?

Back

Balanced forces mean that the net force acting on an object is zero, resulting in no change in motion.

Front

What is the unit of measurement for speed in the metric system?

Back

The unit of measurement for speed is meters per second (m/s) or kilometers per hour (km/hr).

Front

What is the significance of direction in velocity?

Back

Direction is crucial in velocity because it indicates where the object is moving, affecting its overall motion.