REVISION PWS CLASS 9- CH.8 MOTION(PHYSICS)

Front

The slope of a speed-time graph represents:

Back

Acceleration

Front

A particle moving in a circular path of radius r has a displacement after half a circle of:

Back

2r

Front

What is the rate of change in velocity known as?

Back

Acceleration

Front

In a velocity-time graph, if the object is in segment C and shows negative acceleration, what does it indicate?

Back

The object is slowing down.

Front

When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, the retardation is:

Back

−0.5 m/s²

Front

Define speed.

Back

Speed is the distance traveled per unit of time.

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 does a horizontal line on a speed-time graph indicate?

Back

The object is moving at a constant speed.

Front

What is uniform motion?

Back

Uniform motion occurs when an object covers equal distances in equal intervals of time.

Front

What is the formula for calculating acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time.