Answer:
Technician A is correct.
Explanation:
Stroke of the engine means how far is the piston moves during the cycle.It is determined by the crank of the crank shaft. Engine displacement volume is calculated by multiplying length of the stroke to the piston displacement area.
If there are more than one cylinder in the engine, than in that case this number in multiplied by the number of the cylinders inside the engine.
Therefore technician A is correct.
Explanation:
kinetic potential impulse and velocity
Answer:
Explanation:
Given
Frequency of an object in SHM is
Frequency in SHM is given by
where k=spring constant
m=mass of object
if spring is exchanged such that new spring constant is half of previous one then
i.e.
Answer: When the worker is on the top rung
Explanation: When the ladder was initially resting on the wall, the torque from the normal reaction on ladder from the horizontal surface is equal to the torque from the vertical surface on ladder.
The weight of the worker produces a torque which is in the direction of the torque from the normal reaction on ladder, produced by the vertical surface. Therefore for the ladder to stay in rotational equilibrium, the torque on ladder from the normal reaction produced by the horizontal surface must increase.
This increase is possible when the worker is on the lower rung, but as the worker goes high, the magnitude of normal reaction from the vertical surface would increase, thereby increasing the risk of slipping of ladder.