Lever: input at 20 cm from fulcrum, output at 10 cm. Mechanical advantage?

A
½

B
2

C
20

D
200

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Question

State Newton's Second Law of Motion in the form of its defining equation. What does it state about the relationship between net force, mass, and acceleration?

Answer

F_net = m * a. It states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Question

The law says acceleration is directly proportional to net force. What crucial condition must be met for the statement "If force doubles, acceleration doubles" to be true?

Answer

The mass (m) of the object must remain constant.

Question

If the net force on an object is held constant but its mass is doubled, what happens to its acceleration?

Answer

The acceleration is halved (a = F/m; if m doubles, a is cut in half).

Question

A car's engine provides a force to accelerate it. If the car is towing a heavy trailer (increasing total mass), will it accelerate more, less, or the same for the same engine force? Why?

Answer

It will accelerate less. Because a = F/m, an increase in mass (m) with constant force (F) results in a decrease in acceleration (a).

Question

How does Newton's Second Law explain why it's harder to push a full shopping cart than an empty one to achieve the same acceleration?

Answer

The full cart has greater mass (m). To achieve the same acceleration (a), a much greater force (F) is required (since F = m*a).

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If the net force on an object doubles and its mass also doubles, does its acceleration double?

Lever: input at 20 cm from fulcrum, output at 10 cm. Mechanical advantage?

A
½

B
2

C
20

D
200

The mechanical advantage of the lever is ½.

Topic Flashcards

Mini Quiz

Related Questions

Lever: input at 20 cm from fulcrum, output at 10 cm. Mechanical advantage?

A ½ B 2 C 20 D 200

The mechanical advantage of the lever is ½.

Topic Flashcards

Mini Quiz

Related Questions

A
½

B
2

C
20

D
200