D. by putting wheels or rollers on the bottom or feet of furniture
16. Which shows that friction is undesirable?
A. pushing furniture
C. walking on wet floors
B. lighting a matchstick
D. using the breaks when approach
D. WE
17. A boy sits on a grassy slope. What force stops him from sliding down?
A friction
B. magnetic force C. gravity
D. VE
18.
A. acceleration
is a push or a pull.
B. force
C. motion
19. You push a heavy box but the box does not move. How much work have yo
A no work
B. a little work
C. a lot of work
D.
20. Jill pushes a box of books across the floor. What causes the box to move
A. force
B. Friction
C. Gravity
21. Which of the following is an example of electrical energy?
A. the Sun warming a windowsill
C. burning wax producing a flar
B. lightning
D. your body utilizing food lo maint
ch nronerty of an object determines how well it conducts electricity?
fait the obiect sinks in v​