Question

The student has access to the following measurement equipment: a spring scale, a meterstick, and a stopwatch. The student uses the spring scale to pull the cart starting from rest along a horizontal surface such that the reading on the spring scale is always constant. All frictional forces are negligible. In addition to the spring-scale reading, which two of the following quantities could the student measure with the available equipment and then use to determine the inertial mass of the cart? Select two answers.


A) The total distance traveled by the cart after it has been in motion
B) The average speed of the cart while in motion
C)The acceleration of the cart while in motion
D)The time during which the cart is in motion

Answer 1

Answer:

(A) and (D)

With the meter rule the boy can measure the total distance travelled by the cart by application of a constant force.

With the stopwatch he can measure the time it took the cart to cover that distance.

Explanation:

Knowing the distance covered by the cart and how long it took to cover that distance, the equation of constant acceleration motion can be used to find the acceleration of the cart during that motion.

S = ut + 1/2at²

S = distance covered

a = acceleration of the cart and

t = time taken.