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
mina [271]
3 years ago
7

22. (I) A car slows down from 28 m/s to rest in a distance of

Physics
1 answer:
lidiya [134]3 years ago
7 0

Answer:

a = -8.912 m/s²

Explanation:

Given,

The initial velocity of the car, u = 28 m/s

The final velocity of the car, v = 0

The distance traveled by car, d = 88 m

The velocity displacement relation is given by the formula

                                          v = d/t

∴                                         t = d/v

Substituting in the above values in the given equation

                                           t = 88/28

                                            = 3.142 s

The acceleration is given by the formula

                                         a = (v-u)/t

                                            = (0 - 28)/3.142

                                            = -8.912 m/s²

The negative sign is that the car is decelerating.

Hence, acceleration a = -8.912 m/s²

You might be interested in
⚠Heeeeeelelepelepleplepelepeplepe⚠
snow_tiger [21]

Answer:

It's B, anything about a circle is Stationary

4 0
3 years ago
Does the depth of a pot affect how water freezes
Iteru [2.4K]
In my opinion it does. The more water the pot holds, the longer you need to wait for it to freeze. Since there is more water, some parts may not be completely frozen. An experiment you can try is to get an ice cube container and a pot. fill both of them and put them in the freezer for the same amount of time. When you take it out, the ice cubes should be frozen leaving the pot with cold water.
3 0
3 years ago
Read 2 more answers
You are cycling along a flat road.<br> What is the force that is pulling you downwards?
Debora [2.8K]

Answer:Gravity

Explanation:Gravity is the force that pulls everything down instead of up because if we didn’t have gravity we would be floating upwards

7 0
3 years ago
Read 2 more answers
A net force of –8750N is used to stop of 1250.kg car travelling 25m/s. What braking distance is needed to bring the car to a hal
Karolina [17]

Answer:

d = 44.64 m

Explanation:

Given that,

Net force acting on the car, F = -8750 N

The mass of the car, m = 1250 kg

Initial speed of the car, u = 25 m/s

Final speed, v = 0 (it stops)

The formula for the net force is :

F = ma

a is acceleration of the car

a=\dfrac{F}{m}\\\\a=\dfrac{-8750}{1250}\\\\a=-7\ m/s^2

Let d be the breaking distance. It can be calculated using third equation of motion as :

v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{0^2-(25)^2}{2\times (-7)}\\\\d=44.64\ m

So, the required distance covered by the car is 44.64 m.

4 0
3 years ago
Where would you find the lowest-density seawater?
PolarNik [594]
In rivers that are close to sea
4 0
3 years ago
Other questions:
  • How do you find the atomic number of a atom?
    11·2 answers
  • What is specific heat capacity
    6·1 answer
  • What is a star called that dies peacefully​
    11·2 answers
  • What is night vision pls explain in long answer you can copy from google
    10·1 answer
  • In nuclear reactions, the products have less than the reactants. A) mass B) energy C) momentum D) mass-energy​
    9·1 answer
  • A child in a boat throws a 4.5kg package out horizontally with a speed of 13 m/s. Calculate the velocity of the boat immediately
    13·1 answer
  • By the time she managed/had managed to open the door, the postman already went/had already gone.
    11·1 answer
  • If a car with a mass of 5Kg, has a momentum of 25kgm/s, how fast is it travelling?
    6·2 answers
  • Which statement describes how work and power are similar?
    7·1 answer
  • 7. Navy use SONAR method to locate the position of submarine under water. The waves used in SONAR are A transverse waves. B elec
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!