Answer:
It is about 490 Newtons. 490.3325 to be exact
Explanation:
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Answer:
70 km
Explanation:
Before answering, let's remind the difference between distance and displacement:
- Distance: the total length of the path covered, no matter in which direction
- Displacement: the distance in a straigth line between the final point and the starting point of the motion
In this problem, we are asked to find the total distance travelled. So, we can simply add the length of the two parts of the path, regardless of their direction:
d = 30 km + 40 km = 70 km
Answer:
The frequency of sound heard by the boy is 1181 Hz.
Explanation:
Given that,
Frequency of sound from alarm
Speed = -8.25 m/s
Negative sign show the boy riding away from the car
Speed of sound = 343
We need to calculate the heard frequency
Using formula of frequency
Where, = frequency of source
= speed of observer
= speed of source
= speed of sound
Put the value into the formula
here, source is at rest
Hence, The frequency of sound heard by the boy is 1181 Hz.
Answer:
True
Explanation:
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The smaller the displacement, the smallest restoring force it will create.
As seen from the figure given below, The spring system follows the equation,
F = -Kx
where, x is the displacement
F is the restoring force
k is the spring constant
If , K is kept constant, then,
F is directly proportional to the displacement but it acts in opposite direction due to negative sign.