If a boat and its riders have a mass of 1100 kg and the boat drifts in at 1.6 m/s how much work does Sam do to stop it

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.

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

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