Eleventh Grade (Grade 11) Forces and Motion Questions for Tests and Worksheets

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Grade 11 Forces and Motion

In a simple pendulum, decreasing its length by a factor of 4 will .

double its frequency
quadruple its period
decrease its frequency by a factor of 2
decrease its period by a factor of 4

Grade 11 Forces and Motion

A watermelon is dropped from the roof of a three-story building. Assuming the friction of air is negligible, how far does the watermelon have to fall in order to reach a velocity of 10 m/s?

4.9 m
5.1 m
9.8 m
impossible to determine

Grade 11 Forces and Motion

Starting at the same height and rolling down the same track, the speed of a heavier object will be than a lighter object of the same size and shape.

faster
slower
the same

Grade 11 Forces and Motion

Match the feature of the stress strain diagram with its explanation on the right.

__	Elastic Region	A.	Material will not return to original shape
__	Plastic Region	B.	Deformation of the sample; i.e. change in length or shape
__	Elastic Limit	C.	Point at which material will no longer return to its shape and will begin to permanently deform
__	Stress	D.	A force that would stretch a sample
__	Strain	E.	A force that would push from one or more sides toward the middle
__	Ultimate Stress	F.	Maximum stress the material can handle
__	Tension	G.	Force per unit area
__	Compression	H.	No permanent change in shape

Grade 11 Forces and Motion

Inertia is a property of matter wherein it continues to remain at rest or in uniform motion unless an external force triggers the change in motion.

Grade 11 Forces and Motion

Two quantities that are considered vectors are mass and gravity.

True
False

Grade 11 Forces and Motion

The gauge pressure for the air in a balloon equals

$2.02 xx 10^5 \ Pa$ . If atmospheric pressure is equal to

$1.01 xx 10^5 \ Pa$ , what is the absolute pressure of the air inside the balloon?

$0 \ Pa$
$3.03 xx 10^5 \ Pa$
$2.02 xx 10^5 \ Pa$
$1.01 xx 10^5 \ Pa$

Grade 11 Forces and Motion

A force of 230 N applied on a hydraulic lift raises a car weighing 4600 N. If the applied force is exerted on a

$14 \ m^2$ piston, what is the area of the piston under the car?

$70.0 \ m^2$
$280 \ m^2$
$62.6 \ m^2$
$0.70 \ m^2$

Grade 11 Forces and Motion

Why is atmospheric pressure different in Colorado than at sea level?

Air pressure is greater at sea level because there is more humidity in the air.
Air pressure is less in Colorado because more air is above us.
Air pressure is greater in Colorado because more air pushes from below us.
Air pressure is greater at sea level because more air is above you.

Grade 11 Forces and Motion

A rock tied to a string is traveling at a constant speed of 4 m / s in a circle of a radius of 1.5 m. After calculating the magnitude of the centripetal acceleration of the rock, what is the direction of the acceleration?

10.66m/s/s inwards
10.66m/s/s outwards
10.66m/s/s tangentially

Grade 11 Forces and Motion

How far can your little brother run if he can travel 2 m/s for 4 seconds? 8 m

Grade 11 Forces and Motion

In a skating stunt known as "crack-the-whip," a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 80.0 kg and is 6.10 m from the pivot. He is skating at a speed of 6.80 m/s. The magnitude of the centripetal force that acts on him is 606N.

True
False

Grade 11 Forces and Motion

In the system shown, the spring constant

$k$ is quadrupled by parallely connecting three more identical springs. As a result, the period of the simple harmonic motion will .

double
quadruple
decrease by a factor of 2
decrease by a factor of 4

Grade 11 Forces and Motion

An area of 1.0

$m^2$ and an area of 1.0

$cm^2$ have the same atmospheric pressure applied to them. Which of the following statements is correct?

The atmospheric force is greater on the 1.0 $m^2$ area.
The atmospheric force is equal for both areas.
The atmospheric force is less on the 1.0 $m^2$ area.
Atmospheric force does not depend on pressure or area.

Grade 11 Forces and Motion

A force of 580 N is applied on a

$2.0 \ m^2$ piston of a hydraulic lift. If a crate weighing 2900 N is raised, what is the area of the piston beneath the crate?

$1.0 times 10^-2 \ m^2$
$0.40 \ m^2$
$2.5 \ m^2$
$1.0 times 10^1 \ m^2$

Grade 11 Forces and Motion

Which of the following best explains why it is possible to lay on a bed of nails without getting punctured?

The total force decreases as you lay down.
Your weight is spread out over a larger area.
Your surface area decreases when you lay down.
The nails get softer as you warm them up.

Grade 11 Forces and Motion

A dyne is a unit of measurement of force with the units

$g*ft/s^2$ .

True
False

Grade 11 Forces and Motion

Which of the following statements is correct with respect to G and g?

G is a fundamental constant, whereas g is a physical quantity and subject to change.
G and g are both constant, but g is determined by the mass and radius of the Earth.
Both G and g can change, but g can only change if you go to a different planet.
The strength of G is determined by g.

Grade 11 Forces and Motion

The four tires on an automobile have a combined area of

$0.104 \ m^2$ in contact with the ground. The weight of the automobile is

$3.5 xx 10^4 \ N$ . What is the pressure on the tires?

$3.4 xx 10^5 \ Pa$
$1.3 xx 10^6 \ Pa$
$2.5 xx 10^5 \ Pa$
$5.4 xx 10^6 \ Pa$

Grade 11 Forces and Motion

From how high up do you have to drop a marble for it to hit the ground in exactly 1 s?

5.1 m
9.8 m
4.9 m
3.6 m

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Eleventh Grade (Grade 11) Forces and Motion Questions