The motorbike reaches 100 km/h in 3.5 seconds
Explanation:
The motion of the motorbike is a uniformly accelerated motion (= constant acceleration), therefore we can use the following suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
t is the time
For the motorbike in this problem,
u = 0 (it starts from rest)
is the final velocity
is the acceleration
Solving for t, we find the time it takes for the bike to reach that velocity:
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Answer:
Explanation:
As we know that the level of intensity is given as
here we know
now the sound is travelling in all possible directions so we have
now for level of sound we have
Answer:
The answer to your question is the letter C. 3 Watts
Explanation:
Data
Power = ?
Force = 20 N
Distance = 1.5 m
time = 10 s
Formula
Work = force x distance
Power = Work/time
Process
a) Calculate the Work
Work = 20 x 1.5
Work = 30 J
b) Calculate the Power
Power = 30J/10s
Power = 3 Watts
The units of Power are Watts and the units of Work and energy are Joules.
Let's choose east as positive x-direction and south as positive y-direction. We can resolve the two displacement along these two axes:
- Displacement 1 (3.5 km, south of west
- Displacement 2 (2.7 km, east of south
So, the total components on the two directions are
And the magnitude of the hiker's resultant displacement is
The 40 cause ion the air is not gone be in madden