Phys Sem 1 (test, 70 quest.) V4 2023

Front

What is the formula to convert revolutions per second to radians per second?

Back

Angular speed (rad/s) = Revolutions per second × 2π

Front

What does a flat line on a distance-time graph represent?

Back

An object holding the same position over time.

Front

Define a scientific law.

Back

A scientific law is a rule of nature that sums up related observations to describe a pattern in nature.

Front

Calculate the total distance jogged by John if he jogs north for 5 min at 8 km/hr, then north for 30 min at 12 km/hr, and finally south for 35 min at 15 km/hr and 8 km/hr.

Back

Total distance = 13.1 km.

Front

How do you convert hours to minutes?

Back

Multiply by 60 min / 1 hr.

Front

What is angular speed?

Back

Angular speed is the rate of change of angular position of a rotating object, typically measured in radians per second.

Front

What does negative acceleration indicate?

Back

An object is accelerating in the opposite direction of its motion.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity representing how fast an object is moving, while velocity is a vector quantity that includes direction.

Front

What is the significance of the slope in a distance-time graph?

Back

The slope represents the speed of the object; a steeper slope indicates a higher speed.

Front

What is the unit of angular speed?

Back

Radians per second (rad/s).