When a person jumps out of a plane there is only one force on them, what us it?

His weight/gravity

2 of 18

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.

3 of 18

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

5 of 18

When he hits the ground it .......... Up to make him ..........?

Decrease. Pushes .

6 of 18

What is work?

Whenever a force moves

7 of 18

what is the equation and units for work done?

W=Fxd J=Nxm

8 of 18

What is power?

Rate of doing work/transferring energy. Equation is power(J/s) =energy transferred(J) / time (s)

9 of 18

1 J/s is equal to 1......?

Watt

10 of 18

Weight = mass x ........?

Gravity (10/9.8)

11 of 18

Gravitational potential energy equation?

Ep=m x g x h. J=Kg x N/kg x m.

12 of 18

Kinetic energy is a moving objects energy. It increases when an object gets ............?

Faster

13 of 18

Kinetic energy equation?

Ek(J)= 0.5 x m(kg) x v* (m/s)

14 of 18

What is momentum conserved?

A collision provided that no external forces act on the colliding bodies.

15 of 18

Total momentum before collision = ?

Total momentum after collision

16 of 18

Total momentum equation?

P(kgm/s)=m(kg) x v(m/s)

17 of 18

Why would up thrust / air resistance increase?

Because more particles are hitting an object at a given time.

18 of 18

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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