1. A car is traveling initially at 12.6 m/s. It accelerates at 3.1 m/s/s for 6 s

Question

1. A car is traveling initially at 12.6 m/s. It accelerates at 3.1 m/s/s for 6 seconds Find velocity Find displacement
2. A ball is throw horizontally from top of a 24.6 meter tall building at speed 16.5 m/s
A. How long was the ball in the air B. Find mag and dir of velocity of ball just before it hits the ground

1. A car is traveling initially at 12.6 m/s. It accelerates at 3.1 m/s/s for 6 seconds Find velocity Find displacement
2. A ball is throw horizontally from top of a 24.6 meter tall building at speed 16.5 m/s
A. How long was the ball in the air B. Find mag and dir of velocity of ball just before it hits the ground

Find velocity Find displacement
2. A ball is throw horizontally from top of a 24.6 meter tall building at speed 16.5 m/s
A. How long was the ball in the air B. Find mag and dir of velocity of ball just before it hits the ground

Find velocity Find displacement
2. A ball is throw horizontally from top of a 24.6 meter tall building at speed 16.5 m/s
A. How long was the ball in the air B. Find mag and dir of velocity of ball just before it hits the ground

Explanation / Answer

Given

1) u = 12.6 m/s ; a = 3.1 m/s2 ; t = 6 s

We need to find its velocity

We know from equation of motion that,

v = u + at

v = 12.6 m/s + 3.1 m/s2 x 6s = 31.2 m/s

Hence, velocity = 31.2 m/s

We now need to determine its displacement.

Again from the equation of motion:

S = ut + 1/2 a t2

S = 12.6 m/s x 6 s + 1/2 x 3.1 m/2 x 6 s x 6 s = 131.4 m

Hence, displacement = S = 131.4 m

[Pls put the other question seperately... Let me know for any query... Thanks].

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