The displacement of a particle along x – axis is given by x = 7t2 + 8t + 3. Its acceleration and velocity at t = 2s respectively ……….. .
A. 36 ms-1, 14 ms-2
B. 14 ms-2, 36 ms-1
C. 47 ms-2, 21 ms-1
D. 2 ms-1, 47 ms-2
Answer:B
The displacement of a particle along x – axis is given by x = 7t2 + 8t + 3. Its acceleration and velocity at t = 2s respectively ……….. .
A. 36 ms-1, 14 ms-2 B. 14 ms-2, 36 ms-1 C. 47 ms-2, 21 ms-1 D. 2 ms-1, 47 ms-2