Question

Annie wants to find out how different amounts of force can affect how fast an object moves. Which of the following is the best scientific investigation Annie could do to find out?
A.
push objects that have different shapes and measure how far they travel
B.
survey her classmates to see what they think about this topic
C.
push the same object with different amounts of force and measure its speed
D.
measure how much force it takes to move objects with different masses

Answer 1

C. Push the same object with different amounts of force and measure its speed.

This directly tests how varying force changes speed while keeping other factors (mass, surface, shape) constant.