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2 (a) (i) Which of these is the correct equation that relates force, mass and acceleration? A F = m + a B F = m - a C F = m × a D F = m + a (ii) A cyclist has a mass of 70 kg - Edexcel - GCSE Physics Combined Science - Question 2 - 2020 - Paper 1
Question 2
2 (a) (i) Which of these is the correct equation that relates force, mass and acceleration? A F = m + a B F = m - a C F = m × a D F = m + a (ii) A cycl... show full transcript
Worked Solution & Example Answer:2 (a) (i) Which of these is the correct equation that relates force, mass and acceleration? A F = m + a B F = m - a C F = m × a D F = m + a (ii) A cyclist has a mass of 70 kg - Edexcel - GCSE Physics Combined Science - Question 2 - 2020 - Paper 1
Step 1
Which of these is the correct equation that relates force, mass and acceleration?
Answer
The correct equation that relates force, mass, and acceleration is: C F = m × a This equation, known as Newton's second law of motion, establishes that the force acting on an object is equal to the mass of that object multiplied by its acceleration.
Step 2
A cyclist has a mass of 70 kg. Calculate the force needed to accelerate the cyclist at 2.0 m/s². State the unit.
Answer
To calculate the force needed, we can use the formula derived from Newton's second law: Substituting the values: The unit of force is the Newton (N), so the force needed to accelerate the cyclist is 140 N.
Step 3
Another cyclist travels 1200 m in a time of 80 s. Calculate the average speed of the cyclist.
Answer
To calculate the average speed, we use the formula: ext{average speed} = rac{ ext{distance}}{ ext{time}} Substituting the values: ext{average speed} = rac{1200 ext{ m}}{80 ext{ s}} = 15 ext{ m/s} Therefore, the average speed of the cyclist is 15 m/s.