What speed will the body have in 20 s from the beginning of motion if it moves with an acceleration of 0.2 m / s?

1.What speed will the body have in 20 s from the beginning of motion if it moves with an acceleration of 0.2 m / s? 2. 25 seconds after the start of the movement, the car speedometer showed a speed of 36 km / h. What was the average acceleration rate of the car? 3. In 5 s, the speed of the ball increased from 2 m / s to 5 m / s. Determine the acceleration of the ball. 4. How long does it take for a car moving with an acceleration of 0.2 m / s ^ 2 to increase its speed from 10 m / s to 20 m / s? 5. The cyclist moves downhill with an acceleration of 0.2 m / 2 ^ 2. What speed does the cyclist acquire in 10 s if his initial speed is 5 m / s?

1) v = v0 + a * t. (v is the final speed, v0 is the initial speed = 0, and is the acceleration, t is the time) substitute:
v = 0 + 0.2 * 20 = 4 m / s.
2) 36 km / h = 36000/3600 = 10 m / s acceleration = 10: 25 = 0.4 m / s per sq.
3) a = (U2-U1) / t
a = (5-2) / 5 = 3/5 = 0.6 m / s 2
a = 0.2v-? t = 10v0 = 5 Solution: a = v-v0 / tv = a * v0 + tv = 0.2 * 5 + 10 = 10
4) v2 = v1 + aΔt; Δt = (v2-v1) / 2 = (20m / s-12m / s) / 0.4m / s ^ 2 = 20s
5) v = t * a = 10 * 5 = 50 m / s