a cyclist moves from the rest with a constant acceleration of 4 m/s²

1. what is the average speed of the cyclist for the 3 s interval
a. 6m/s
b. 9m/s
c. 12m/s
d. 15m/s

2. what is the distance covered in the 3 s from the rest
a. 14 m
b. 16 m
c. 18 m
d. 20 m


a pebble is thrown vertically downwards from a bridge with an initial velocity of 10m/s and strikes the surface of the water in 2 s

3. What is the pebble's acceleration
a. 0
b. 1.11m/s²
c. 3.33m/s²
d. 9.8m/s²


4. what is the pebbles velocity when it hits the surface of the water
a. 7.4m/s
b. 14.8m/s
c. 22.2m/s
d. 29.6m/s


Please answer correctly po i need it!
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