1) A car is stopped at a red light for 1 minute. The light turns green and the d

Question

1) A car is stopped at a red light for 1 minute. The light turns green and the dr the accelerator giving the vehicle an acceleration of 3.5 m/sA2. iver pushes down on How long does it take the vehicle to reach 40 mph? a. b. How far does the vehicle go during that timeframe? 2) A small ball is launched vertically into the air, from the ground, with an initial velocity of 50 m/s a. How high does the ball go? b. What is the ball's velocity the moment before it hits the ground? c. What is the ball's total flight time? d. What is the total distance travelled by the ball?

Explanation / Answer

a) Final velocity V =40mph =17.8816 m/s

V=u+a*t

17.8816=0+3.5*t

t=17.8816/3.5

t=5.11 seconds

b)

V^2=u^2+2*a*S

V^2=0+2*a*S

S=V^2/2*a

S=17.8816^2/(2*3.5)

S=45.68 metres

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