Movement

Question 1

Explain what distinguishes first class levers from second and third class levers.

Revolt · Accepted Answer

First-class levers have the fulcrum between the effort and the load. Second-class levers have the load between the fulcrum and effort, while third-class levers have the effort between the fulcrum and load.

Question 2

Explain what is meant by the term mechanical advantage.

Revolt · Accepted Answer

Mechanical advantage is the ratio of the output force to the input force. It shows how much a machine multiplies the force applied to it.

Question 3

Explain how Newton's law of inertia describes the motion of objects.

Revolt · Accepted Answer

Newton's law of inertia states that an object at rest stays at rest, and an object in motion continues moving at a constant speed and in a straight line, unless an unbalanced external force acts on it.

Question 4

Explain how Newton's law of inertia describes the motion of objects.

Question 5

The most common lever in the human body is the __________.A.first class leverB.second class leverC.third class leverD.fourth class lever

Revolt · Accepted Answer

C

Question 6

What is kinetic energy?A.the energy an object has due to its motionB.the energy derived from chemical reactionsC.the energy an object has due to its positionD.the energy an object releases as heat

Revolt · Accepted Answer

A

Question 7

To overcome an object's inertia, it must be acted upon by __________.A.gravityB.energyC.forceD.acceleration

Revolt · Accepted Answer

C

Question 8

Explain why a seesaw is closest in arrangement to a first class lever.

Question 9

What tissue connects muscles to bones?A.ligamentsB.tendonsC.cartilageD.smooth muscle

Revolt · Accepted Answer

B

Question 10

Explain why a seesaw is closest in arrangement to a first class lever.

Revolt · Accepted Answer

A seesaw is like a first-class lever because its fulcrum is positioned between the effort applied on one side and the load on the other side.

Movement Answers

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