To calculate the average speed of the car, we need
B. The total distance driven on the racetrack
Explanation:
The average speed of an object in motion is given by
where
d is the distance covered by the object
t is the time interval considered to calculate the speed
The SI units of the speed are metres per second (m/s).
In this problem, we know the time interval:
t = 30 s
Therefore, in order to find the average speed, by looking at the equation we see that we also need the total distance driven by the car, so the correct answer is
B. The total distance driven on the racetrack
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Answer:
Th answer is 1-
Explanation:
trust me i have this all on the periodic table thing my school gave lol
The lights will no longer work because the circuit will be cut
Answer:
The thrust is 
Explanation:
Given that,
Mass of gas, 
The rate at which the gas is expelling, 
We need to find the thrust produced by the gas.
We know that force is equal to the rate of change of momentum. So,
Also, p = mv
So,
So, the thrust is
Answer:
A. Shear stresses are maximum at the neutral axis and normal stresses are maximum furthest from the neutral axis.
Explanation:
Normal stress :
Normal stress is defined as the stress or the restoring force that occurs on the plane when an external axial load is applied on it. For a beam the normal stress is maximum at the point furthest from the neutral axis and is zero at the neutral axis of the beam.
Shear stress :
Shear stress is a stress which occurs when the force acts on the surface of the member in a parallel direction. It changes the shape of the member. For a beam, the shear stress is maximum at the neutral axis.
