P1: MOTION

P1: MOTION

motion

force

work

energy

power

Motion

Multiple Choice

The standard unit for acceleration is

• mph

• m/s

• m/s²

Multiple Choice

During which interval is the object slowing down?

• A to B
• D to E
• E to F
• G to H

Multiple Choice

During which interval is the object speeding up?

• A to B
• B to C
• D to E
• E to F

Multiple Choice

During which interval is the object not moving?

• B to C
• C to D
• D to E
• only at point A

Multiple Choice

A horizontal slope on a speed time graph means the person is

• speeding up

• slowing down

• standing still

• moving at a steady pace

Multiple Choice

What is the definition of "weight"?

• measure of the force of gravity on your body
• the time it takes to get on a ride 
• the amount of matter in an object
• the size of an object

Multiple Choice

If an object has more mass, then it will

• weigh more.
• weigh less.
• weigh the same as an object with less mass.
• always have more volume than an object with less mass.

Multiple Choice

Which is the smallest measurement of mass?

• gram

• milligram

• kilogram

Multiple Choice

The weight of an object _________ as it moves away from the center of Earth.

• increases
• stays the same
• triples
• decreases

Multiple Choice

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

• stays the same
• decreases
• increases
• doubles

Density

Multiple Choice

Helium balloons rise on earth because

• helium is less dense than air
• helium is more dense than air
• helium is cooler than air
• helium is warmer than air

Multiple Choice

An object should float in a liquid if it is 

• Denser than the liquid 
• Less dense than the liquid
• Lighter than metal
•  Shaped like a ball 

Multiple Choice

If an object has a density of 3.6 g/mL and you put it into water, will it sink or float?  

• sink
• float

Multiple Choice

What units can be used to express density?

• g/mL
• grams
• millimeters
• milliliters

Multiple Choice

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL

• 7 g/cm³

• 28 g/cm³

• 1/7 g/cm³

Effects of forces

• Hooke's Law: F = kx

• Friction:

  the force between two surfaces which impedes motion and results in heating ​

• Air resistance is a form of friction

• Resultant force

Resultant force

• The resultant force is the single force that has the same effect as two or more forces acting together.

• Two forces in different direction but same magnitude will cause zero resultant force (at rest or constant speed)

• Two forces that act in the same direction produce a resultant force that is larger than either individual force

Multiple Choice

A bungee rope has a spring constant of 5N/m. How much a person must weighs in Newton if we want it to extend (stretch) 10m?

• 20N

• 22cm

• 50N

• 50cm

• 21N

Multiple Choice

Which is the correct definition of a 'force'?

• An influence, which cannot be measured, that causes something to move, stop moving or change direction.
• An influence, which can be measured, that causes something to move, stop moving or change direction.
• Something which has power.
• An influence, which can be measured, that causes something to move.

Multiple Choice

What is the name of the units that we measure force in?

• Einsteins 
• Newtons
• Kg
• Metres

Multiple Choice

When two objects rub together, what force do they produce

• Gravity
• Air resistance
• Friction
• Water resistance

Multiple Choice

Which of these is NOT a force?

• Friction
• Air resistance
• Water resistance
• Electrical resistance

Multiple Choice

Is the car

• Stationary
• Moving at constant speed
• Accelerating
• Decelerating

Multiple Choice

Is the car

• Stationary
• Moving at constant speed
• Accelerating
• Decelerating

Multiple Choice

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?

• 50N to the left.
• 350N to the left.
• 350N to the right.
• 50N to the right.

Pressure

Multiple Choice

What is pressure?

• The amount of force exerted on a surface

• The surface area of an object

• The weight of an object

Multiple Choice

What is the unit of measurement for pressure?

• pascal
• grams
• milliters
• meters

Multiple Choice

Why won't you sink in mud if you wear boots?

• Because the surface area is larger creating less pressure.

• Has air in it to keep you floating.

• Because the mud won't want you.

Multiple Choice

What pressure does a 4000N horse exert on the ground if each foot is 10cm²?

• 40 N/cm²
• 100 N/cm²
• 400 N/cm²
• 10 N/cm²