Phys 203

Gravity is the force objects put on each other because of their ______.

• Mass

• Friendliness

• Acceleration

• Speed

Tags

NGSS.MS-PS2-4

Two factors effecting the magnitude of the force of gravity between 2 objects are...

• mass and distance 

• mass and matter

• distance and weight 

• weight and mass

Tags

NGSS.MS-PS2-4

Why would you weigh less on the moon?

• less air

• less sunlight

• there is no water on the moon

• less gravitational pull

Tags

NGSS.MS-PS2-4

Calculate the mass of an object if it took 20 N of force to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s

• 4.1 kg

• 3.6 kg

• 2.5 kg

• 1.8 kg

Tags

NGSS.MS-PS2-2

The velocity is always _____ to the line of a circle. 

• outwards

• towards the center

• tangent

• faster

What happens to an object's speed as the radius decreases?

• It increases.

• It decreases.

• It remains unchanged.

What is the tangential velocity if the centripetal force is 150 N when a 3 kg toy plane flies in a 2 m radius circle?

• 10 m/s

• 100 m/s

• 225 m/s

• 15 m/s

Tags

NGSS.HS-PS2-1

What is the direction of the velocity at point B, if the ball is revolving clockwise?

• up

• right

• down

• left

A bicycle has a period of 0.3s . What is the

speed of its tires if their radius is 30 cm?

• 6 m/s

• 3 m/s

• 60 m/s

• 30 m/s

Tags

NGSS.MS-PS3-1

The time taken for one complete circuit is called the... 

• Period

• Frequency 

• Angular velocity

Tags

NGSS.HS-PS4-1