(B1) LAWS OF MOTION (15/11/24)

A vector quantity is :

• Work
• Pressure
• Distance
• Velocity

The S.I unit of velocity is :

• Km h-1
• m min-1
• Km min-1
• m s-1

The unit of retardation is :

• m s-1
• m s-2
• m
• m s2

A body when projected up with an initial velocity u goes to a maximum height h in time t and then comes back at the point of projection. The correct statement is :

• The average velocity is 2h/t
• The acceleration is zero
• The final velocity on reaching the point of projection is 2u
• The displacement is zero

18 km h-1 is equal to :

• 10 m s-1
• 5 m s-1
• 18 m s-1
• 1.8 m s-1