It's going down...
What force pulls all objects towards the Earth?
Gravity
What unit is used to measure force?
Newton (N)
What happened when we added lots of coins to a boat?
Sank
How will ice impact stopping distance?
Increase it
What is the name of the force that slows falling objects down as they move through air?
Air Resistance
What does a Newton balance measure?
Force
What force pushes objects upward in water?
Upthrust
What word do I use to describe INCREASING speed?
Acceleration
Why does a crumpled paper ball fall faster than a flat paper sheet?
The crumpled ball has less surface area, so it experiences less air resistance.
What do lubricants do?
Reduce friction.
How does density impact floating?
Two parts of stopping distance?
Thinking and braking
Explain how surface area affects air resistance.
Larger surface area increases air resistance, slowing an object more.
Calculate the weight of a 0.3 kg mass on Earth (g = 10 N/kg).
3N
What does floating mean?
Staying on the surface of a liquid without sinking.
One factor affecting thinking distance?
Driver alertness / tiredness / distractions / alcohol
Why do the feather and hammer fall at the same rate on the Moon?
There is no air on the Moon, so no air resistance acts on the feather.
What happens to an object if forces are balanced?
Stay in the same place OR move at constant speed
Why does a sponge float?
Upthrust greater than weight
How do airbags reduce injury?
They increase the time over which you stop, reducing force on the body.