1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nina [5.8K]
2 years ago
5

A car with a mass of 1. 2 × 103 kilograms starts from rest and attains a speed of 20 meters/second in 5 seconds. What net force

acted on the car to cause that acceleration? A. 3. 0 × 102 newtons B. 6. 0 × 102 newtons C. 1. 2 × 103 newtons D. 4. 8 × 103 newtons E. 1. 2 × 104 newtons.
Physics
1 answer:
GaryK [48]2 years ago
3 0

Answer:

The formula for force according to Newton's second law of motion is F=ma or force for an object to move is equal to mass times acceleration.

Acceleration or average acceleration defined as change in velocity per time.

F=ma

F=1.2x10³kg*(20m/s)(1/5s)=4.8x10³  Newtons

Explanation:

fthat's not the answer then i'm sorry

You might be interested in
What is necessary to designate a position? A. a reference point B. a direction C. fundamental units D. motion E. all of these
max2010maxim [7]

Answer:

E. all of these

Explanation:

The designation of a point in space all the points that necessary

- reference point

- a direction

- fundamental units

- a direction

- motion

all are necessary to designate a point in space. Hence option E is correct.

For example in simple harmonic motion we need to specify all the above factors of the object in order to designate the position of the object.  

8 0
3 years ago
Why should we change away from using incandescent light bulbs
Maurinko [17]

They are energy inefficient

Explanation:

The main reason why we must change away from using incandescent lighting bulbs is because of their energy inefficiency.

  • Much of the power consumed is used in producing heat in an incandescent bulb.
  • Therefore, they are energy inefficient.
  • Energy saving bulbs produces less heat and they are more durable.
  • Most energy saving bulbs are typically more expensive.
  • Most incandescent bulbs are also not environmentally friendly.

Learn more:

Electric bulb brainly.com/question/10421964

#learnwithBrainly

8 0
3 years ago
A block of mass m=9.0 kg and speed V and is behind a block of mass M= 27 kg and speed of .50 m/s. The surface is frictionless, a
sammy [17]

Answer:

2.06 m/s

Explanation:

From the law of conservation of linear momentum, the sum of momentum before and after collision are equal. Considering this case where we have frictionless surface, no momentum is lost in the process.

Momentum before collision

Momentum is given by p=mv where m and v represent mass. The initial sum of momentum will be 9v+(27*0.5)=9v+13.5

Momentum after collision

The momentum after collision will be given by (9+27)*0.9=32.4

Relating the two then 9v+13.5=32.4

9v=18.5

V=2.055555555555555555555555555555555555555 m/s

Rounded off, v is approximately 2.06 m/s

5 0
3 years ago
A uniform horizontal rod of mass Mand length rotates with angular velocity about a vertical axis through its center. Attached to
Lostsunrise [7]

Answer:

     o

90

Explanation:

3 0
3 years ago
A girl is standing 150m in front of a tall building, fires a shot with starting pistol. A boy standing 350m behind her, hears tw
Natasha2012 [34]

Answer:

300 m/s

Explanation:

The difference in time between the two bangs is 1 s.

Thus;

t2 - t1 = 1

We know that distance/time = speed.

Thus;

d2/v - d1/v = 1

Multiply through by v to get;

d2 - d1 = v

Where v is speed of sound in air.

d1 = 350 m

d2 = (150 × 2) + 350 = 650 m

Thus;

v = d2 - d1 = 650 - 350 = 300 m/s

8 0
3 years ago
Other questions:
  • A lead ball is dropped into a lake from a diving board 6.10 mm above the water. After entering the water, it sinks to the bottom
    10·2 answers
  • In the context of depth perception, which of the following is a monocular cue?
    7·1 answer
  • Which statement about the atomic nucleus is correct? a. The nucleus is made of protons and neutrons and has a negative charge. b
    11·1 answer
  • Do all of them please and explain
    15·2 answers
  • What kind of materials does light pass through?
    14·1 answer
  • Nutritionists use the ______ to measure how much energy we get from foods.
    9·2 answers
  • Determine the largest intensity w of the uniform loading that can be applied to the frame without causing either the average nor
    13·1 answer
  • A rock is dropped from a 110-m-high cliff. How long does it take to fall (a) the first 55.0 m and (b) the second 55.0 m?
    11·1 answer
  • Una lente forma una imagen de un objeto, el cual está a 16.0 cm de la lente. La imagen está a 12.0 cm de la lente del mismo lado
    10·1 answer
  • ______________ is a physical property and can be _______________ or _____________.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!