Select Correct One Over Physics Quiz

8 Questions | By Kinagratse | Last updated: Mar 20, 2022 | Total Attempts: 108

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Chapter 4 & 5

Questions and Answers

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