Math  /  Algebra

Question74. A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 129kg129-\mathrm{kg} laser sensor that measures the thickness of the ice (see the drawing). The helicopter and the sensor both move only in the horizontal direction and have a horizontal acceleration of magnitude 2.84 m/s22.84 \mathrm{~m} / \mathrm{s}^{2}. Ignoring air resistance, find the tension in the cable towing the sensor.

Studdy Solution

STEP 1

What is this asking? We need to find the force in the cable pulling a sensor being towed by a helicopter accelerating horizontally. Watch out! The altitude of the helicopter is irrelevant, so don't let it trick you!
We only care about the horizontal forces.

STEP 2

1. Analyze the forces
2. Calculate the tension

STEP 3

Alright, picture this: a helicopter zipping across the arctic, towing a sensor.
The sensor is just cruising along with the helicopter, right?
That means it's accelerating at the *same rate* as the helicopter.

STEP 4

What's making the sensor accelerate?
It's the **tension** in the cable!
That cable is the only thing pulling the sensor forward horizontally.
No cable, no acceleration!

STEP 5

Newton's second law tells us that force equals mass times acceleration: F=maF = m \cdot a.
Here, the **force** is the **tension** (TT) in the cable, the **mass** (mm) is the **mass of the sensor** (129 kg129 \text{ kg}), and the **acceleration** (aa) is the **horizontal acceleration** (2.84 m/s22.84 \text{ m/s}^2).

STEP 6

Let's plug the values into our equation: T=maT = m \cdot a T=129 kg2.84 m/s2T = 129 \text{ kg} \cdot 2.84 \text{ m/s}^2

STEP 7

Time to crunch the numbers!
Multiplying the **mass** and the **acceleration** gives us the **tension**: T=366.36 NT = 366.36 \text{ N}

STEP 8

The tension in the cable towing the sensor is 366.36 N\mathbf{366.36 \text{ N}}.

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