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. survey her classmates to see what they think about this topic
b. push the same object with different amounts of force and measure its speed
c. push objects that have different shapes and measure how far they travel
d. measure how much force it takes to move objects with different masses

B. push the same object with different amounts of force and measure its speed

Explanation:

to do this reseach...Annie will need to push the same object with different forces.

this way...every time Annie pushes it with a different force, she needs to measure how fast it moves (measuring the speed).

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

i believe the answer would be:

d. violin, clarinet, french horn, and tuba