A car accelerates while trying to merge onto the freeway. Its speed goes from 0 km/h to 70km/h in 10 seconds. What is its accele
1 answer:
You might be interested in
Answer:
Explanation:
Given that:
- mass of 1 skier,
- inclination of hill,
- length of inclined slope,
- time taken to reach the top of hill,
- coefficient of friction,
<em>Now, force normal to the inclined plane:</em>
<em>Frictional force:</em>
<em>The component of weight along the inclined plane:</em>
<em>Now the total force required along the inclination to move at the top of hill:</em>
<em>Hence the work done:</em>
<em>Now power:</em>
<u>So, power required for 30 such bodies:</u>
The final velocity of the car is +1.5 m/s.
Explanation:
We have to divide the problem into two parts.
In the first part, the car starts from rest and accelerates for 5.0 s. We can find the final velocity of the car after this first part using the suvat equation:
where
v is the final velocity
u = 0 is the initial velocity
is the acceleration
t = 5.0 s is the time
Substituting,
In the second part, the brakes are applied, so the car decelerates for 3.0 s, and the final velocity is given by
where
v' is the final velocity
v = 7.5 m/s is the velocity at the beginning of this part
is the deceleration
t = 3.0 s is the time
Substituting,
So, the final velocity is +1.5 m/s.
Learn more about accelerated motion:
#LearnwithBrainly