You are moving at a speed 2/3 c toward randy when randy shines a light toward you. at what speed do you see the light approachin
1 answer:
You might be interested in
a) The acceleration of the objects is
b) The tension in the string is 280.8 N
Explanation:
a)
We start by writing the equations of motion for the two masses attached to the pulley.
For the heavier mass, we have:
(1)
where
is the mass
is the acceleration of gravity
T is the tension in the string
a is the acceleration of the system (here we assumed that the heavier mass accelerates downward)
For the lighter mass, we have
(2)
where
T is the tension in the string
is the mass
is the acceleration of gravity
a is the acceleration of the system (here we assumed that the lighter mass accelerates upward)
From (1) we get
And substituting into (2),
b)
From the previous part of the problem we got an expression for the tension in the string:
Where we have
is the acceleration, found in part a)
Susbtituting, we find
Learn more about forces and acceleration:
#LearnwithBrainly
Answer:
The value is
Explanation:
Generally the velocity attained by the sled after t = 3.10 s is mathematically evaluated using the kinematic equation as follows
Here u = 0 \ m/s
a = 13.5
So
=>
The is distance it covers at this time is
=>
=>
Now when sled stops its the final velocity is while the initial velocity will be the velocity after its acceleration i.e
So
Here , the negative sign shows that it is deceleration
So
=>