Centre of mass of a body

• lies always along the edge

• lies always inside the body

• lies always outside the body

• may lie within or outside the body

The velocity of centre of mass of the system remains constant, if the total external force acting on the system is

• minimum

• maximum

• unity

• zero

When a torque acting upon a system is zero. Which of the following will be constant?

• Force

• Linear impulse

• Linear momentum

• Angular momentum

The time required for one complete revolution is:

• torque

• frequency

• period

• rotational kinetic energy

A ball on a string is spun around in a circle. Which of the following quantities is not constant?

• mass

• force

• velocity

• acceleration

Centripetal acceleration is ...

• Acceleration toward the center of a curved or circular path
• Acceleration toward the outside of a circle
• Vertical motion instead of horizontal motion

Which of the following is the unit for centripetal force?

• J
• m/s²
• kg⋅m/s
• N

You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?

• Friction
• Centripetal Force
• Gravity
• Inertia

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which one is a vector quantity?

• energy

• torque

• both of these

• none of these

Torque depends on

• force

• moment arm

• mass

• force and moment arm