# Select Correct One Over Physics Quiz

8 Questions | Total Attempts: 108

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Chapter 4 & 5

• 1.
Which of the following statements can be explained by Newtons first law? a)when your car suddenly comes to a halt, you lunge forward b) when ur car rapidly accelerates, you are pressed backward against the seat
• A.

Neither a and b

• B.

Both a and b

• C.

B but not A

• 2.
Mass of car=1850 kg. one person applies a force of 275 N while other 395 N. both act in same direction. third force 560 N acts but in different opposite to that in which people are pushing. Find acceleration?
• A.

.059 m/s^2

• B.

1.4 m/s^2

• C.

2.5 m/s^2

• D.

.125 m/s^2

• 3.
The net external fprce acting on an object is zero. which of the ff statements is true?
• A.

Object is stationary

• B.

Object can only b traveling with a constant velocity

• C.

Object can either stationary or traveling with a constant velocity

• D.

Object can only be traveling with a velocity that is changing

• 4.
In Case A an object is moving straight downward with a constant speed of 9.80 m/s, while in Case B an object is moving straight downward with a constant acceleration of magnitude 9.80 m/s^2. Which one of the ff is true?
• A.

A nonzero net external force acts on the object in both cases

• B.

A nonzero net external force acts on the object in neither case

• C.

A nonzero net external force acts on the object in Case A only

• D.

A nonzero net external force acts on the object in Case B only

• 5.
A Man is stranded on a raft(Mman +raft =1300kg), By paddling he causes an average force P of 17N to be applied to the raft in direction due eat( the +x direction). The wind also exerts a force A on the raft. This force has a magnitude of 15N and points 67degrees N of E. Find x and y components of the raft's acceleration.
• A.

Ax= .014m/s^2 Ay=.020m/s^2

• B.

Ax= .315m/s^2 Ay=.10m/s^2

• C.

Ax= .024m/s^2 Ay=.023m/s^2

• D.

Ax= .018m/s^2 Ay=.011m/s^2

• 6.
At question above. the velocity of raft is 0.15m/s, in a direction due east ( the +x direction). Forces maintained 65 s, find the x and y componenets of the raft's displacement during this time interval.
• A.

X=56 y=40

• B.

X=48 y=23

• C.

X=32 y=54

• D.

X=98 y=67

• 7.
Newtons second law indicates that when a net force acts on an object, it must accelerate. Does this mean that when two or more forces are applied to an object simultaneously, it must accelerate.
• A.

True

• B.

False

• 8.
All of the ff. except one cause the acceleration of an object to double. Which one is the excepption?
• A.

All forces acting on the object double

• B.

Net force acting on the object double

• C.

Both the net force acting on the object and the mass of d object double

• D.

The net force acting on the object remains the same, while the mass of the object is reduced by a factor of two

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