Outside our solar system the closest star to earth is Proxima century life from the start takes 2200000 minutes to reach earth.
1 answer:
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Answer:
a) 32.58 m/s²
b) 161.84 m/s
Explanation:
Initial velocity = u = 0
Final velocity = v = 145 m/s
Time taken = t = 4.45 s
s = Displacement of dragster = 402 m
a = Acceleration
The final velocity is greater than the velocity used to find the average acceleration due to the gear changes. The first gear in a dragster has the most amount of toque which means the acceleration will be maximum. The final gears have less torque which means the acceleration is lower here. The final gears have less acceleration but can spin faster which makes the dragster able to reach higher speeds but slowly.
Ball is thrown at an angle of 20 degree with velocity 18 m/s
so first we will find the two components of the velocity
similarly for other component
now the ball will cover horizontal distance of 30 m till it reach to other player
so here we can use the formula of time
so it will take 1.77 s to reach the other player