A boat is moving upstream at a speed of 10 km/h in a river that flows downstream

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What’s inside this PDF?

Question: A boat is moving upstream at a speed of 10 km/h in a river that flows downstream at 5 km/h. What is the speed of the boat relative to the riverbank?

Options:

5 km/h
10 km/h
15 km/h
0 km/h

Correct Answer: 5 km/h

Solution:

The speed of the boat relative to the riverbank is the speed of the boat minus the speed of the river: 10 km/h - 5 km/h = 5 km/h.

A boat is moving upstream at a speed of 10 km/h in a river that flows downstream

Practice Questions

A boat is moving upstream at a speed of 10 km/h in a river that flows downstream at 5 km/h. What is the speed of the boat relative to the riverbank?

5 km/h
10 km/h
15 km/h
0 km/h

Questions & Step-by-Step Solutions

A boat is moving upstream at a speed of 10 km/h in a river that flows downstream at 5 km/h. What is the speed of the boat relative to the riverbank?

Step 1: Identify the speed of the boat moving upstream, which is 10 km/h.
Step 2: Identify the speed of the river flowing downstream, which is 5 km/h.
Step 3: To find the speed of the boat relative to the riverbank, subtract the speed of the river from the speed of the boat.
Step 4: Perform the calculation: 10 km/h (boat speed) - 5 km/h (river speed) = 5 km/h.
Step 5: The result, 5 km/h, is the speed of the boat relative to the riverbank.

Relative Speed – Understanding how to calculate the speed of an object in relation to another moving object.
Vector Addition – Applying the concept of vector addition to determine the resultant speed when two velocities are in opposite directions.

A boat is moving upstream at a speed of 10 km/h in a river that flows downstream

What’s inside this PDF?

A boat is moving upstream at a speed of 10 km/h in a river that flows downstream

Practice Questions

Questions & Step-by-Step Solutions

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