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
Arisa [49]
3 years ago
6

A car moves with an initial velocity of

Physics
1 answer:
garik1379 [7]3 years ago
6 0

Answer:

Explanation:

v = u + at

a) v = 18 + 1.5(7.0)

   v = 28.5 m/s

b) v = 18 - 1.5(7.0)

   v = 7.5 m/s

You might be interested in
William Tell shoots an apple from his son's head. The speed of the 102-g arrow just before it strikes the apple is 26.7 m/s, and
xxMikexx [17]

To develop the problem, we require the values concerning the conservation of momentum, specifically as given for collisions.

By definition the conservation of momentum tells us that,m_1V_1+m_2V_2 = (m1+m2)V_f

To find the speed at which the arrow impacts the apple we turn to the equation of time, in which,

t= \sqrt{\frac{2h}{g}}

The linear velocity of an object is given by

V=\frac{X}{t}

Replacing the equation of time we have to,

V_f = \frac{X}{t}\\V_f =\frac{X}{\sqrt{\frac{2h}{g}}}\\V_f = \frac{6.9}{\sqrt{\frac{2(1.85)}{9.8}}}\\V_f = 11.23m/s

Velocity two is neglected since there is no velocity of said target before the collision, thus,

m_1V_1 = (m1+m2)V_f

Clearing for m_2

m_2 = \frac{m_1V_1}{V_f}-m_1\\m_2 = \frac{(0.102)(26.7)}{11.23}-0.102\\m_2 = 0.1405KG= 140.5g

8 0
3 years ago
An object has moved through a distance. Can it have zero displacement? Justify your answer.PLEASE I WILL MARKK AS BRAINLIESTT
DochEvi [55]

Answer:

Explanation:

yes object can move through a distance  and can have zero displacement  

as displacement is the shortest distance between two points eg: if a person has moved a distance of 20 m and comes back to his original place by moving back 20m in such a case  distance moved by the person is 40m but his displacement is 0 as shortest distance covered by him is 0 as he is in his original place

Yes, it is possible for a body to have traveled a distance yet have a displacement of zero.

Distance traveled by a body is the length of the path covered by it.

On the other hand displacement of a body is the shortest distance between the initial and the final point of a body.

When a body is traveling such that it ends at the point from where it started its journey, it covers a distance but the displacement of the body is zero.

So a body that has moved through a distance can have zero displacement.

3 0
2 years ago
Help plz I’ll mark brainliest
kotykmax [81]

Answer:

The second option- a substance that a wave can travel through.

Explanation:

Hope This Helps!!

(brainliest please)

7 0
3 years ago
Read 2 more answers
Please help me with this 29 points
Irina18 [472]

Answer:

)Give the definition of poverty line as defined by the World Bank.

7 0
3 years ago
All but one of the following is an important component of soil.
viktelen [127]
Air is the answer i do believe
4 0
4 years ago
Read 2 more answers
Other questions:
  • Today s electric generators work on the same principle as the dynamo invented by _____.
    10·1 answer
  • The energy radiated per unit surface area (across all wavelengths) for a black body with temperature 2200. Use 5.67 x 10-8 for t
    8·1 answer
  • Weight is related to mass but they are not the same. What is weight defined?
    10·1 answer
  • What best describes the difference between the second sound wave and the first
    15·1 answer
  • Choose the true statement(s) about binary fission in prokaryotic cells. There may be more than one correct answer.
    9·1 answer
  • Representation in the House is based on<br>A. equality between states<br><br>B. a state's population
    15·1 answer
  • A rock has a mass of 3.1 kg. What is its weight on earth
    14·1 answer
  • A factory line moves parts for an automobile at a constant speed of 0.22 m/s. How long does it take the parts to move 8.5 m alon
    15·1 answer
  • Calculate the momentum of a 4,800 kg car with a velocity of 25 m/s.
    15·2 answers
  • !! Offering 50 points !!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!