Answer:
1408 J.
Explanation:
From the question given above, the following data were obtained:
Combined mass (m) = 1100 kg
Velocity (v) = 1.6 m/s
Workdone =?
Next, we shall determine the kinetic energy of boat. This can be obtained as follow:
Combined mass (m) = 1100 kg
Velocity (v) = 1.6 m/s
Kinetic energy (K.E) =?
K.E = ½mv²
K.E = ½ × 1100 × 1.6²
K.E = 550 × 2.56
K.E = 1408 J
Thus the kinetic energy of the boat is 1408 J.
Since the boat is moving with a kinetic energy of 1408 J, it will take an equivalent amount of energy to stop the boat. Hence, the Workdone to stop the boat is 1408 J.
Answer:
-1408 J
Explanation:
W= Kf-Ki
Kf= 0 because boat stopped so no velocity
Ki= 1/2 mv^2
Ki= 1/2 (1110)(1.6)^2
Ki= 1408
W= Kf-Ki
W= 0- 1408 = -1408 J
