Semi-Finals Reviewer for Science 9

A car covers 400.0 m while increasing its velocity from 2.0 m/s to 30.0 m/s.

Which of the following is a given data for initial velocity?

• 2.0m/s  

• 30m/s

• 1s

• 400m

A car covers 400.0 m while increasing its velocity from 2.0 m/s to 30.0 m/s.

Which of the following is a given data for final velocity?

• 400m

• 2.0m/s

• 30.0m/s

• 1s

Which of the following is a quantity with magnitude only and has no direction?

• speed

• velocity

• acceleration

• vector

It is the distance per unit time.      

• speed

• velocity

• acceleration

• motion

The rate of change in velocity per unit time.

• speed

• velocity

• acceleration

• distance

The change in position with respect to a reference point is also known as

• speed

• velocity

• acceleration

• motion

The force of attraction on earth acting on freely falling body is known as

• Gravity

• Acceleration due to gravity

• Free fall

• Collision

The acceleration of a freely falling object/body.

• Gravity

• Acceleration due to gravity

• Free fall

• Collision

The idealized motion in which air resistance is neglected and acceleration is constant.

• Gravity

• Acceleration due to gravity

• Free fall

• Collision

He proposed that objects of different weights would fall at the same rate if no external force acted on them.

• Aristotle 

• Galileo Galilei

• David Scott

• Newton