Question

need answer no need of explanation​

Answer 1

Answer:

114m

8 m/s²

S = 8m

U= 4 m/s

Step-by-step explanation:

1st case

u = 5 m/s

a = 12 m/s²

T = 3 seconds

S = 5×12+½×12×3²

= 60+6×9

=60+54

= 114

2nd case

U = 7 m/s

a =?

T = 4

S = 92

92 = 7×4+½×a×4²

92=28+8a

8a=64

a=64/8 = 8 m/s²

3rd case

U = 4 m/s

a = 3 m/s²

S=?

V =8 m/s

V²-u²=2as

64-16=2×3×s

48=6s

s = 8m

4th case

u=?

a = 5 m/s²

S = 8.4 m

V = 10

V²-u²=2as

100-u²=2×5×8.4

100-u² = 84

u²= 100-84

u²=16

u = 4 m/s