Class 9 Motion 1

How is displacement different from distance?

• displacement is a vector, it must have magnitude and direction

• displacement is a vector, it must have magnitude only

• displacement is a scalar, it must have magnitude and direction

• displacement is a scalar, it must have magnitude only

The Standard Units for Speed is ?

• m/s (meters per second)
• ms (meters times seconds)
• mskg (meters times seconds kilograms)
• m/s*kg (meters per second kilograms)

Runner A (blue) has the same displacement as Runner B (black).

• False
• True

Acceleration: is the rate of change in ___________.

• speed
• distance
• velocity 
• displacement 

An object is _____ if its position changes relative to another object.

• in motion
• at reset
• a frame of refence
• magical

How can you find the distance around a circle?

• 2πr

• d/t

• v²

• T

A truck driving at 60 km per hour travels 150 km. How long is it driving for?

• 9000 hours

• 0.4 hours

• 210 hours

• 2.5 hours

Which of the following is a vector quantity?

• Work

• Speed

• Velocity

• Force

• Accelaration

Ram travels at a speed of 20 km/hr while going to school. While coming back, he travels at a speed of 30 km/hr(due to less traffic). What his it’s average speed?

• 25km/hr

• 26km/hr

• 20km/hr

• 24km/hr

• Cant be determined

When something has speed in a certain direction it is called ___________.

• motion
• position
• velocity
• speed