Question

Two rockets with the same mass are accelerated. Rocket A accelerates twice as quickly as rocket B. Which statement is correct?(1 point)
Responses

The motor in rocket A is four times as powerful as the motor in rocket B.
The motor in rocket A is four times as powerful as the motor in rocket B.

The motor in rocket A is equally as powerful as the motor in rocket B.
The motor in rocket A is equally as powerful as the motor in rocket B.

The motor in rocket A is twice as powerful as the motor in rocket B.
The motor in rocket A is twice as powerful as the motor in rocket B.

The motor in rocket A is half as powerful as the motor in rocket B.
The motor in rocket A is half as powerful as the motor in rocket B.

Answer 1

The motor in rocket A is twice as powerful as the motor in rocket B.

Reason: a = F/m, so with equal mass and aA = 2 aB, the thrust F_A = 2 F_B. At the same speed, power P = Fv, so P_A = 2 P_B.