exsci physics

What are the correct units for force?

• joules

• newton

• watts

• m/s

Which of these is the correct formula linking force and acceleration?

• force = mass x acceleration

• acceleration = mass x force

• force = weight x acceleration

• acceleration = weight x force

When the astronaut Buzz Aldrin first stood on the Moon, he could feel a difference in the pull of gravity. Which statement is correct?

• He was weightless.

• His mass was now zero.

• His mass was the same but his weight was less.

• His weight was the same but his mass was less.

Answer explanation

weight depends on gravitaional pull , mass does not

Which of these statements give the correct description and unit for mass and weight?

• A

• B

• C

• D

850 N

• mass
• weight

45 kg

• mass
• weight

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

The amount of matter in an object is 

• pressure
• weight
• mass
• force

Mass is measured in 

• kilograms, grams, or milligrams
• kiloliters, liters, or milliliters
• newtons

The mass of an object ___________ as it moves away from the center of Earth

• stays the same
• decreases
• increases
• doubles