Q2 CHAPTER 5: FORCE AND EQUILIBRIUM

Question 1

A push and pull of an object

Answer 1

Force

Question 2

Is at rest

Answer 2

Balanced force

Question 3

They act in the same or opposite direction and are parallel to one another

Answer 3

Parallel force

Question 4

Is equal to the product of the force that causes the rotation and the lever arm

Answer 4

Torque

Question 5

Is a state of motion that does not change

Answer 5

Equilibrium

Question 6

Is the point at which all of the weight of the object seems to be concentrated. The weight is equally distributed on both sides of the body.

Answer 6

Center of gravity

Question 7

Is the ability of an object to maintain its position or overcome the tendency to tip over when pushed

Answer 7

Stability

Question 8

When mowing a lawn with tall grasses which of the following should the gardener do to reduce the force he exerts?

a. Raised handle of the lawn mower
b. Lower the handle of the lawn mower
c. Change the handle with a longer one
d. Change the handle with a shorter one

Answer 8

b. Lower the handle of the lawn mower

Question 9

Which of the following will not increase the stability of an object?

a. Increasing the objects mass
b. Increasing the area of its base
c. Raising the object center of gravity
d. Keeping the object center of gravity near the geometric center of its base

Answer 9

c. Raising the object center of gravity

Question 10

________ is a measure of the ability of a force to rotate an object

a. Balance
b. Center of gravity
c. Stability
d. Torque

Answer 10

d. Torque

Question 11

The following may change in an object when an unbalanced force is applied to it, except ________?

a. Direction of motion
b. Mass
c. Shape
d. Speed

Answer 11

b. Mass

Question 12

In which direction should the force be applied with respect to the lever arm to produce the maximum torque?

a. Parallel
b. At 45°
c. Anywhere between 45° and 90°
d. Perpendicular

Answer 12

d. Perpendicular

Question 13

Which of the following is the point at which all of the weight of an object seems to be concentrated?

a. Center of gravity
b. Geometric center
c. Midpoint
d. Pivot point

Answer 13

a. Center of gravity

Question 14

Which of the following objects has its center of gravity located outside its body?

a. Cone
b. Donut
c. Eraser
d. Ruler

Answer 14

b. Donut

Question 15

Suppose you’re riding a train, in which of the following positions are you most stable?

a. Bending
b. Sitting
c. Standing on one leg
d. Standing on both legs

Answer 15

b. Sitting

Question 16

Where should you push a door to open the get easily?

a. At the hinges
b. Near the hinges
c. In the middle of the door
d. Farthest from the hinges

Answer 16

d. Farthest from the hinges

Question 17

When two or more forces act simultaneously at a point in an object, which force balances the resultant force?

a. Concurrent force
b. Equilibrant force
c. Parallel force
d. Torque

Answer 17

b. Equilibrant force