Constant Acceleration

?
What is speed?
How fast something moves, regardless of direction.
1 of 9
What is displacement?
How far an object moves in given direction, (m).
2 of 9
What is velocity?
Rate of change of displacement, (m/s).
3 of 9
What is acceleration?
The rate of change of velocity, (m/s2)
4 of 9
What is instantaneous speed?
Speed at a given moment.
5 of 9
Give the 5 different formulae for motion...
A = (v-u)/t, V(avg)= (u+v)/2, s=(u+v)t/2, s=ut+1/2at2, 2as=v2-u2
6 of 9
A tile falls from the roof 25 metres above ground level. Assuming initial rest, calculate the speed when it hits the ground.
S = 1/2at2 -> sq root of 25/0.5*9.81 = 2.26s. v=at+u -> 2.26*9.81 = 22.1m/s
7 of 9
A motorcyclist slows down uniformly as he approaches a red light. He takes 3.2s to stop, and travels 40m. How fast did he initially travel and what is his acceleration?
v=0m/s, t=3.2s, s=40m, s=(u+v)t/2. 2s/t=u 80/3.2=25m/s. a=v2-u2/2s, -25^2/2*-80=-7.8m/s
8 of 9
A cyclist travels at 3ms^-2, constant speed, as he starts to roll down a hill and accelerates constantly. During third second, he travels 6m. Calculate acceleration. How far does he travel during his fourth second?
v0=3, v1=3+a, v2=3+2a, v3=3+3a. s=(u+v)t/2. 6=6+5a/2 a=1.2ms^-2. v3= 6.6m/s, v4=7.8. s=(u+v)/2 = 7.2m.
9 of 9

Other cards in this set

Card 2

Front

What is displacement?

Back

How far an object moves in given direction, (m).

Card 3

Front

What is velocity?

Back

Preview of the front of card 3

Card 4

Front

What is acceleration?

Back

Preview of the front of card 4

Card 5

Front

What is instantaneous speed?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Motion resources »