A change in velocity is called

• speed.
• displacement.
• acceleration.
• a vector.

Tags

NGSS.HS-PS2-1

 $\alpha=\frac{\Delta\omega}{\Delta t}$  is called

• angular velocity
  

• angular acceleration

• rotational inertia 

What is the Unit for Torque

• Nm
• N
• W
• J

The easiest way to open a heavy door  is by applying the force

• Near the hinges
• In the middle of the door
• At the edge of the door far from the hinges
• At the top of the door

Tags

NGSS.HS-PS2-1

Analogue of mass in rotational motion is

• moment of inertia

• radius of gyration

• torque

• angular momentum

Rotational inertia equals to

• $m$

• $mv^2$

• $mr$

• $mr^2$

The product of mass and velocity in linear motion is named as

• kinetic energy

• displacement

• momentum

• power

Angular momentum is the product of

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

• Force

• Linear impulse

• Linear momentum

• Angular momentum

Tags

NGSS.HS-PS2-2

A skater start spinning on the tips of her skates at low angular velocity with arm outstretched.

What would happen when she brings her arms close to her body

• She will spin slower

• She will spin faster

• She will spin at the same velocity