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4 years ago

A car moving along a straight level road has an initial speed of 3 m s-1 and its acceleration is 2 m s-2? What

Physics

2 answers:

BlackZzzverrR [31]4 years ago

7 0

Answer:

13 ms-1

Explanation:

xxMikexx [17]4 years ago

4 0

Answer:

SE RESUELVE CON LA ECUACIÓN DE GALILEO GALILEI

Explanation:

<em>v</em> = 3 m/s + $2 m/s^{2}$ (5 s) = 13 m/s

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The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 miles per hou

kirill115 [55]

Answer:

Part A

it would take 6 sec

it would take 3 sec

Explanation:

We are told that the power supplied to the wheel is constant which means that the sport car is gaining energy i.e

$power \ \alpha \ energy$

Hence if power is constantly supplied energy constantly increase

From the formula of the Kinetic energy

$KE = \frac{1}{2} mv^2$

we can see that as the speed doubles from 29 mph to 58 mph the energy needed is $2^2$ = 4 times of the energy from the formula

Also the time needed would also be 4 times because energy i directly proportional to time

Hence to reach 58mph the time that it would take is

= $4* 1.5sec = 6sec$

We are told that the ground pushes the car with a constant force and

F = ma

this means that the acceleration is also constant

now from newtons law

v = u +at

Looking at it we see that final velocity is directly proportional with time

hence it would take twice the time to reach twice the final velocity

Time to reach 58mph = 3 s

since time to reach 29 mph( $\frac{1}{2} \ of \ [58mph]$ ) =( $\frac{1}{2} \ of \ 3sec$ )1.5 s

6 0

3 years ago

1. Which statement is true about natural

lara [203]

Answer:

1. D. They can be a substance, material, object or source of energy.

2. B. The properties will be different.

3. C. When two reactants form one product, the reaction is spontaneous.

4 0

3 years ago

How much heat is absorbed by a 125 g sample of water when it is heated from 25.20 ºc to 32.80 ºc? the specific heat of water is

Fofino [41]

We can use the equation of
E = mc△T
To calculate the total heat absorbed.
E is the total heat absorbed (energy used)
m is mass.
c is specific heat capacity and
△T is the temperature change.
E = 125 x 4.184 x (32.8 - 25.2)
E = 3974.8 J
Therofre the total heat absorbed is 3974.8 joules.

4 0

3 years ago

In a standard title block, the size of the

jeyben [28]

The correct answer is B: a set of dimensions

8 0

3 years ago

Two metals are used to make batteries. Would a battery in which both metals components are copper, make a good battery? Explain

alexdok [17]

I think that the answer is yes. Because copper is a cunductor of DC and AC. However electritions are trying to avoid copper wiring because its a poor conductor.

So I guess you could goth ways but I say yes it could work.

4 0

3 years ago