Answer:
The maximum height is 2881.2 m.
Explanation:
Given that,
Acceleration = 29.4 m/s²
Time = 7.00 s
We need to calculate the distance
Using equation of motion
Put the value into the formula
We need to calculate the velocity
Using formula of velocity
Put the value into the formula
We need to calculate the height
Using formula of height
Put the value into the formula
We need to calculate the maximum height
Using formula for maximum height
Put the value into the formula
Hence, The maximum height is 2881.2 m.
<span>We know that v = u + at
He stops when the speed is zero; therefore
0 = 15 - 3.35 t
t = 4.48
It takes 4.48 seconds after the driver turns on the brake for him to stop.
We know
s = ut + (1/2)at</span>²<span>
s = 15*4.48 - *(1/2)(3.25)(4.48)</span>²<span>
s = 33.4 meters
The distance he travels before applying the brakes is:
s = 0.21 * 15
s = 3.15 m
The total distance he travels is:
3.15 + </span>33.4 = 36.55 meters
He will be able to stop in time.
Explanation:
Given that,
Force, F = 70 N
Angle,
Acceleration of the boy, a = 1.8 m/s²
(a) Net force is equal to the product of mass and acceleration. So,
(2) Normal force = upward force
So,
Hence, mass is 38.89 kg and the normal force is 245.23 N.
Answer:
In physics, the concept of a frame of reference is used to specify the perspective from which an object or event is observed.
A frame of reference is where the measurements or observations will be made. Because of this, observing an event may be different when changing from one frame of reference to another, because the measurements will be different.
Defining frames of reference is necessary because the movement is relative, it may be that from our perspective or from a frame of reference on earth we are at rest, but seen from a frame of reference in space, we are in motion due that the earth is always moving.
Another example of frames of reference is a moving plane. Seen from the ground an object in the plane moves at the speed at which the plane travels, but if the frame of reference is fixed on the plane, the object is at rest.
Answer:
(a) The maximum conduction current is A
(b) Value of V
(c) Maximum value of
Explanation:
Given:
Radius of circular plates m
Separation between plates m
Frequency Hz
Maximum displacement current A
(a)
Displacement current is equal to the conduction current so we write,
A
(b)
From the formula of displacement current,
Where , peak value of emf,
V
(c)
From another formula of displacement current,
Where change in flux
Therefore, the maximum conduction current is A and value of
V and maximum value of