Physics Quiz

What is the definition of gradient?

• A vector that points in the direction of the steepest decrease of a function at a given point.

• A vector that points in the direction of the steepest increase of a function at a given point.

• A vector that points in the direction of the flattest increase of a function at a given point.

• A scalar that represents the rate of change of a function at a given point.

What is the formula to calculate acceleration?

• acceleration = (final velocity + initial velocity) / time

• acceleration = (final velocity - initial velocity) * time

• acceleration = (final velocity - initial velocity) / time

• acceleration = (final velocity * initial velocity) / time

What is the difference between velocity and speed?

• Velocity is the rate of change of displacement, while speed is the rate of change of distance.

• Velocity includes direction, while speed does not.

• Velocity is measured in meters per second, while speed is measured in kilometers per hour.

• Velocity is a scalar quantity, while speed is a vector quantity.

What does a positive gradient (increasing slope) on a speed-time graph indicate?

• deceleration

• acceleration

• constant speed

• zero acceleration

What does a negative gradient on a speed-time graph indicate?

• Deceleration

• Constant speed

• Acceleration

• No motion

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

• Acceleration

• Deceleration

• Constant speed

• No motion

What does a positive gradient on an acceleration-time graph indicate?

• Deceleration in the positive direction

• Acceleration in the negative direction

• No acceleration

• Acceleration in the positive direction

What does a negative gradient on an acceleration-time graph indicate?

• Deceleration

• Positive acceleration

• Constant speed

• Acceleration

What does a horizontal line on an acceleration-time graph indicate?

• Constant acceleration

• Zero acceleration

• Variable acceleration

• Negative acceleration

What is the unit of acceleration?

• km/h

• m/s

• m/s^2

• cm/s^2