Question: A cyclist of mass 70 kg accelerates at 2 m/s². What is the force exerted by the cyclist on the ground? (2021)
Options:
70 N
140 N
210 N
280 N
Correct Answer: 140 N
Exam Year: 2021
Solution:
Using F = ma, F = 70 kg * 2 m/s² = 140 N.
A cyclist of mass 70 kg accelerates at 2 m/s². What is the force exerted by the
Practice Questions
Q1
A cyclist of mass 70 kg accelerates at 2 m/s². What is the force exerted by the cyclist on the ground? (2021)
70 N
140 N
210 N
280 N
Questions & Step-by-Step Solutions
A cyclist of mass 70 kg accelerates at 2 m/s². What is the force exerted by the cyclist on the ground? (2021)
Step 1: Identify the mass of the cyclist, which is 70 kg.
Step 2: Identify the acceleration of the cyclist, which is 2 m/s².
Step 3: Use the formula for force, which is F = ma (Force = mass × acceleration).
Step 4: Substitute the values into the formula: F = 70 kg * 2 m/s².
Step 5: Calculate the force: F = 140 N.
Newton's Second Law of Motion – This law states that the force acting on an object is equal to the mass of that object multiplied by its acceleration (F = ma).
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