Referring to the graph below of data describing a cart pulled across a level surface. When a 4 N force pulls on the cart, the ca
rt accelerates at 5 m/s^2. What is the friction force resisting the pull?
2 answers:
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The average speed of the car for the entire trip can be calculate by using:
where S is the total distance covered by the car, and t is the total time taken.
The total distance travelled by the car is:
while the total time taken is:
so, the average speed of the car is:
so, the correct answer is (3) 85 km/h.
