A car is pulling a trailer with a mass of 650 kg at a constant velocity of 30 m·s⁻¹ towards the east on a rough surface - NSC Technical Sciences - Question 2 - 2021 - Paper 1
Question 2
A car is pulling a trailer with a mass of 650 kg at a constant velocity of 30 m·s⁻¹ towards the east on a rough surface. The car's engine applies a force to move bot... show full transcript
Worked Solution & Example Answer:A car is pulling a trailer with a mass of 650 kg at a constant velocity of 30 m·s⁻¹ towards the east on a rough surface - NSC Technical Sciences - Question 2 - 2021 - Paper 1
Step 1
2.1 State Newton's First Law of Motion in words.
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Answer
Newton's First Law of Motion states that an object will remain at rest, or continue moving at a constant velocity, unless acted upon by an unbalanced/resultant/net force.
Step 2
2.2 Define the term tension.
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Answer
Tension is the force acting in a string or rope that results from pulling or stretching forces.
Step 3
2.3 If the trailer is replaced by another trailer with a mass of 750 kg, how will this impact on the tension in the rope? Write down only INCREASES, DECREASES or REMAINS THE SAME.
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Answer
Increases
Step 4
2.4.1 What will happen to the book as the brakes are applied? Write only MOVES FORWARD, MOVES BACKWARD or REMAINS IN THE SAME POSITION.
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Answer
Moves forward
Step 5
2.4.2 Use a science law/principle to explain your answer to QUESTION 2.4.1.
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Answer
According to Newton's first law of motion, the book will continue moving forward at a constant velocity of 30 m·s⁻¹ until a net force acts on it.
