Pallavi wants to find out whether the length of a ramp affects the force needed to move a wooden block up the ramp. She sets up the given experiment. What should she keep the same?
A The height of both the ramps
B The length of both the ramps
C The weight of spring balance
D Both (A) and (B)
Ans 2:
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Class : Class 8
Ans is C as weight of spring balance should be same. It is not necessary for the height of both the ramps to be same.
Ans 4:
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Ans 20:
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Class : Class 4
C should be the answer because the WEIGHT of the spring balance should be the same in order to test whether or not the length of the ramp affects the Force needed to move the wooden block