P2.2 Forces

• Created by: Abbey_tj
• Created on: 30-03-19 18:06
Newton's First Law is....
an object will continue to stay at rest or move with unifrom velocity unless a force acts upon it
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A force is.......
something that causes an objecst to move
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A contact force is......
you have to in contact with it
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A non-contact force is ......
a force you don't have to be in conatct with
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Incertia (in-er-sha) is....
is a measurement of how difficult it is to chnage the motion of an object.
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What is the equation for force......
mass (kg) x acceleration (m/s/s)
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What is terminal velocity.....
the max speed an object can reach
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What is the equation for momentum......
mass (kg) x velocity (m/s)
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How do you work out velocity......
distance/time (distance divided by time)
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how do you find the weight of anything.....
mass x gravity
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What is the conservation of momentum......
statate that the momentum of a system is constant if there are no external forces acting on it.
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What is the equation for work done.......
force (N) x distance (m)
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What is the equation for power.......
work done (J) / time (s)
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1KJ is equal to .....
1000J
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What is a resultant force.......
the forece when two or more forces are added together as vectors
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Elastic collision is........
a collision in which kinetic energy is conserved
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Equilliberium means......
an object is in equilliberium if all the forced are cancelled out, the resultant force is zero (0)
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A freebody diagram is........
a diagram that shows the forces acting on a single object.
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Friction is......
a constant force which occurs when the atoms make up the surfaces interact when rough surafces slide over one another.
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Newton's Second Law is.......
if the resultant force is not zero the motion of an object (speed or direction) changes.
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Newton's Third Law is ........
Forces come in pairs: the force of x on y and the force of y on x
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When travelling in the aire, what is the force acting upwards........
air resistance
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Name 3 examples of forces......
Either three out of: gravity weight magnetic attraction friction electrostatic attraction pull force push force upthrust air resistance tension driving force
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If a bowl were to be floating on water, what are the two forces acting upon it.......
upthrist as it is in water and weight
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What is the resultant force of a ball moving left at 15N and moving right at 7N .........
8N left
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What is the force of an object with a mass of 3,5Kg and and accelration of 80m/s/s.......
280N
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As someone opens a parachute, there is a very ________ air resistance force so she starts to _____________
large and decelarate
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What is the momentum of an object with the mass of 2000kg and a velocity of 35m/s..........
70000kgm/s
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What unit is momentum measured in........
kgm/s
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What unit is force measured in.......
N
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What unit is Work Done measured in........
J
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What unit is Power measure in.......
W (Watt)
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How much work is done when a man pushes a van against a friction force of 300N for 10m
300x10=3000J
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Other cards in this set

Card 2

Front

something that causes an objecst to move

Back

A force is.......

Card 3

Front

you have to in contact with it

Back Card 4

Front

a force you don't have to be in conatct with

Back Card 5

Front

is a measurement of how difficult it is to chnage the motion of an object.

Back 