Answer:
Momentum = Mass × velocity
by multiplying mass and velocity of that object , we can find out it's Momentum
P = M × V
a) mg = * ω
b)ω =
c)14.7 the magnitude of the initial acceleration of the end B when the string is cut.
<h3>What is Acceleration?</h3>
Acceleration is the rate of change of the velocity of an object with respect to time.
Given
A rod of length 56.0 cm and mass 1.40 kg is suspended by two strings which are 42.0 cm long, one at each end of the rod.
When the string is cut rod rotates about other end.
Let's take momentum equation about that end:
mg* = Iω [I = ]
a) mg = * ω
Angular acceleration:
b)ω =
c)Acceleration of end B:
a = lω= =
a = 14.7 [g=9.8]
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Answer:
- 3 cm
Explanation:
From the mirror formula;
1/f = 1/v + 1/u ; where f is the focal length, v is the image distance, and u is the object distance.
1/-4.5 = 1/9 + 1/v
1/v = -1/4.5 - 1/9
= -1/3
Therefore;
v = -3 cm
Hence;
Image distance is - 3cm
Answer:
The new speed is 1230.28 m/h
Explanation:
The jet airliner moving initially at 503 mph to the east
The wind is blowing at 855 mph in a direction 52° north of east
At first let us distribute the velocity of the wind into east component
and north component
→ The east component is 855 cos(52) m/h
→ The north component is 855 sin(52) m/h
Now we have two components of velocity in the east direction
and one component of velocity in the north direction
The new speed is the resultant of the east and north components
→ The east components are 503 m/h and 855 cos(52) m/h
→ The north component is 855 sin(52) m/h
Add the components of the speeds in direction of east
→ The east component = 503 + 855 cos(52) = 1029.39 m/h
→ The north component = 855 sin(52) = 673.75 m/h
Now we can find the new speed as a resultant speed of the east and
north components
→ The new speed =
→ The new speed = 1230.28 m/h
<em>The new speed is 1230.28 m/h</em>
Zero. Dipoles do not have an electric field as it is cancelled out by the dipole it's self. However, the general rule for the propagation of an electric field is the inverse square law.
k is simply a constant of the value 9.9 x