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In the movie Speed, Jack (Keanu Reeves) climbs onto a crawler to get under a bus moving at 50 mph to dismantle a bomb. If the coefficient of kinetic friction is 0.2 and the combined mass of Jack and the crawler is 110 kg, how much tension force is on the tow cable that keeps him steady?

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Final answer:

Jack (Keanu Reeves) climbs onto a crawler to get under a bus moving at 50 mph to dismantle a bomb, if the coefficient of kinetic friction is 0.2, the tension force on the tow cable is 215.6 N.

Step-by-step explanation:

To calculate the tension force on the tow cable that keeps Jack steady while he dismantles the bomb under the moving bus in the movie Speed, we need to consider the forces acting on the system. The main force opposing the motion is the force of kinetic friction between the crawler and the ground.

The magnitude of this force can be calculated using the formula:

Frictional Force = coefficient of kinetic friction * Normal Force

Normal Force = mass * gravitational acceleration = 110 kg * 9.8 m/s² = 1078 N

Frictional Force = 0.2 * 1078 N = 215.6 N

The tension force on the tow cable is equal in magnitude but opposite in direction to the frictional force. Therefore, the tension force is 215.6 N.

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