Answer:
x = 5.79 m
Explanation:
given,
mass of the car = 39000 Kg
spring constant = 5.7 x 10⁵ N/m
acceleration due to gravity = 9.8 m/s²
height of the track = 25 m
length of spring compressed = ?
using conservation of energy
potential energy is converted into spring energy
x = 5.79 m
the spring is compressed to x = 5.79 m to stop the car.
Answer:
141.152 miles per hour is the speed of the plane in miles per hour
Explanation:
Speed of plane = Total distance travelled/total time taken -
v = D/t
Substituting the given values in the above equation, we get
v = 467/3.3 miles /hour
v = 141.152 miles per hour
141.152 miles per hour is the speed of the plane in miles per hour
Explanation:
According to the Faraday-Lenz law, a conductive ring generates an induced current due to the change in the magnetic flux caused by the motion of the bar magnet. This induced current generates a magnetic field opposite to the magnetic field of the bar, generating an upward force that opposes the weight of the bar magnet, Therefore, it does not move as a freely falling object.
Answer:
Difference in temperature
Contact between the bodies
Answer:
0.05
Explanation:
Given a variable C which is the product of two variables A, B:
Then the absolute error on C is given by:
where 
are the uncertanties on the measure of A, B and C, respectively.
In this problem, the horizontal component of the velocity 
is given by
Therefore, the uncertainty on vx is given by:
(1)
where we have:
, so
The uncertainty on 
is given by:
where:
and
So
Also,
So, combininb everything into (1), we find:
