Speed
A car travels 60 m in 12 s. What is its speed?
60 / 12 = 5m/s
A car accelerates from rest at 2 m/s² for 2 s. Distance?
4.0 m. (0.5×2×2²)
Dropped from rest, how far in 1.0 s? (g = 9.8)
4.9m = 1/2 x 9.8 x 12
Formula for speed.
S = D/T
A car goes 30 m in 6 s. Speed?
30 / 6 = 5 m/s
A runner goes 400 m in 80 s. Average speed?
400 / 80 = 5 m/s
A cart accelerates from rest at 3 m/s² for 4 s. What is the distance?
24 m. (0.5×3×42)
Dropped from rest, how far in 2.0 s?
19.6m = 1/2 x 9.8 x 22
Formula for distance, with a constant acceleration.
d = 1/2 x a x t2
A cart accelerates at 2 m/s² for 3 s. Distance?
9.0 m. (0.5×2×32)
A biker rides 1,200 m in 300 s. What is the speed?
1,200 / 300 = 4 m/s
An object accelerates at 5 m/s² for 3 s. Distance?
22.5 m. (0.5×5×32)
Dropped from rest, how far in 3.0 s?
44.1m = 1/2 x 9.8 x 32
Formula for free-fall distance.
d = 1/2 x g x t2
A rock falls for 2 s. Distance?
19.6 m. (0.5×9.8×22)
A dog runs 150 m in 25 s. What is the Speed?
150 / 25 = 6 m/s
A rocket accelerates at 4 m/s² for 5 s. Distance?
50 m. (0.5×4×52)
Dropped from rest, how far in 4.0 s?
78.4m = 1/2 x 9.8 x 42
Rearrange s = d/t to solve for d.
d = s x t
A ball accelerates at 3 m/s² for 6 s. Distance?
54 m. (0.5×3×62)
A train covers 2,000 m in 250 s. What is the speed?
2,000 / 250 = 8 m/s
A ball accelerates at 6 m/s² for 10 s. Distance?
300 m. (0.5×6×102)
Dropped from rest, how far in 5.0 s?
122.5m = 1/2 x 9.8 x 52
Rearrange s = d/t to solve for t
A rock falls for 4.0 s. Distance?
78.4 m. (0.5×9.8×42)