When a person jumps out of a plane there is only one force on them, what us it?
His weight/gravity
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As the parachutist goes faster what increases? What does this mean?
Air resistance/drag this means his weight /gravity are now balanced and traveling at a constant speed (terminal velocity) his not accelerating any more.
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What happens when the parachutist opens a parachute?
Air resistance/drag increases. This resistant force upwards means he slows down.
4 of 18
After opening the parachute the forces become equal and b...........?
Balanced
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When he hits the ground it .......... Up to make him ..........?
Decrease. Pushes .
6 of 18
What is work?
Whenever a force moves
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what is the equation and units for work done?
W=Fxd J=Nxm
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What is power?
Rate of doing work/transferring energy. Equation is power(J/s) =energy transferred(J) / time (s)
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1 J/s is equal to 1......?
Watt
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Weight = mass x ........?
Gravity (10/9.8)
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Gravitational potential energy equation?
Ep=m x g x h. J=Kg x N/kg x m.
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Kinetic energy is a moving objects energy. It increases when an object gets ............?
Faster
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Kinetic energy equation?
Ek(J)= 0.5 x m(kg) x v* (m/s)
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What is momentum conserved?
A collision provided that no external forces act on the colliding bodies.
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Total momentum before collision = ?
Total momentum after collision
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Total momentum equation?
P(kgm/s)=m(kg) x v(m/s)
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Why would up thrust / air resistance increase?
Because more particles are hitting an object at a given time.
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Other cards in this set
Card 2
Front
When a person jumps out of a plane there is only one force on them, what us it?
Back
His weight/gravity
Card 3
Front
As the parachutist goes faster what increases? What does this mean?
Back
Card 4
Front
What happens when the parachutist opens a parachute?
Back
Card 5
Front
After opening the parachute the forces become equal and b...........?
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