Year 7 speed and gravity Flashcards
(19 cards)
Speed =
Distance ➗ time
Distance=
Speed ✖️time
Time=
Distance ➗ speed
Speed is measured in…
Metres per second
Distance is measured in…
Metres
Time is measured in…
Seconds
On a distance time graph what does an upwards sloping line mean
Constant speed
On a distance time graph what does a horizontal straight line mean
The person has stopped
On a distance time graph what does a sloping line in an upwards curve mean?
Acceleration
How is deceleration shown on a distance time graph?
A curve where the line rises but levels off
Relative motion going in same directions=
Big No. - smaller No.
Relative motion going in different directions =
Big No. + smaller No.
Relative motion
Calculation of motion relative to another moving object.
What are gravity, up thrust, water resistance, magnetic, static, pull, push, friction, compression and twist.
Forces
Which of these are contact forces; gravity, up thrust, static, magnetic, water resistance, pull, push, friction, compression and twist?
Up thrust, water resistance, pull, push, friction, compression and twist
Which of these are noncontact forces; gravity, up thrust, static, magnetic, water resistance, pull, push, friction, compression and twist?
Gravity, static and magnetic
What is the gravitational field strength on Earth?
10 N/kg
What is a gravitational field?
It is a place in which gravity is active.
Why is gravity different on other planets?
Gravity changes by how close you are to the planet and the planet’s mass.
