A car going initially with a velocity 13.5 m/s accelerates at a rate of 1.9 m/s for 6.2 s. It then accelerates at a rate of-1.2
2 answers:
Answer:
a) Maximum speed = 25.28 m/s
b) Total time = 27.26 s
c) Total distance traveled = 390,5537
Explanation:
In order to solve the first proble we just have to use the next formula:
So the maximum speed would be 25,28 m/s.
THe total time of the trip will be given by adding the inital time plus the velocity divided by the acceleration rate:
Remember that when dealing with time in physics you will always use positive numbers since there is no negative time.
To calculate the total distance covered we use the next formula:
This is the first part now we calculate it with the stopping of the car:
No we just add the two distances to discover the whole distance:
Total distance= 124,268+266,2857= 390,5537
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Answer:
magnitude of A − B = 15.81 km
Explanation:
Vector A points in the negative y-direction and has a magnitude of 5 km. Vector B points in the positive x-direction and has a magnitude of 15 km.
According to Cartesian coordinate system, the resultant will start either from tail of A and ends at head of B and vice-versa.
A(0,-5)
B(15,0)
A - B = (-15 i - 5 j )
Magnitude of the vector is given by
|A - B| =
|A - B| =
|A - B| = 15.81 km
Answer:
The well is 7.1 meters deep.
Explanation:
The formula to use here is the distance in a uniformly accelerated motion:
where d stands for distance, t for time, a for acceleration, v0 and d0 for initial velocity and distance, respectively. Since the initial distance and velocity are both zero, we are left with the first term. The coin is in free fall and so it is accelerated by gravity:
The well is 7.1 meters deep.
Given:
Sample 1:
Chloroform is
12 g Carbon
1.01 g Hydrogen
106.4 g Cl
Sample 2:
30.0 g of Carbon
Solution:
mass of chloroform from sample 1:
12 + 1.01 +106.4 =119.41 g
Now, for the total mass of chloroform in sample 2:
mass of chloroform
mass of chloroform = 119.41 = 298.53 g