Newton's second law of motion is expressed as f = ma. a lawn mower is pushed over a length of grass. if the pushing force suddenly doubles what will happen to the lawn mower's rate of acceleration? the mass of the lawn mower is constant. a. the acceleration will double. b. the acceleration will decrease by half. c. the acceleration will remain constant. d. the acceleration will triple.

A) The acceleration will double

Explanation:

Given the expression according to Newton's second law F = ma where;

F is the force

m is the mass of the object

a is the acceleration

Let the initial force be F1 and acceleration be a1

F1 = ma1...(1)

If the pushing force suddenly doubles if the lawn mover is pushed over a length of grass, the new force F2 = 2F1 and acceleration of force F2 will be a2, since the mass doesn't change;

F2 = ma2

2F1 = ma2...(2)

Dividing equation 2 by 1, we will have;

2F1/F1 = ma2/ma1

2 = a2/a1

a2 = 2a1

This shows that the acceleration doubles if the pushing force doubles since force is directly proportional to the acceleration. Increase in the applied force will lead to equal increase in the acceleration and vice versa

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

no link

explanation: