The mass of the car should be A) 1212 kg
Explanation:
We can solve the problem by using Newton's second law of motion, which states that
where:
F is the force produced by the engine
m is the mass of the car
a is its acceleration
In the first situation we have
m = 1515 kg
is the acceleration
Solving for F, we find the force produced by the engine:
Now we want the car to reach an acceleration of
Using the same engine, therefore the force produced is still
F = 18,180 N
Re-arranging the equation for m', we find what should be the new mass of the car:
Learn more about Newton's second law:
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Yes but the thicker the glass the stronger the magnet has to be
Answer:
a condition in which is real or imagined in fear are difficult to control
Answer:
The work done by the hoop is equal to 5.529 Joules.
Explanation:
Given that,
Mass of the hoop, m = 96 kg
The speed of the center of mass, v = 0.24 m/s
To find,
The work done by the hoop.
Solution,
The initial energy of the hoop is given by the sum of linear kinetic energy and the rotational kinetic energy. So,
I is the moment of inertia, 
Since, 
Finally it stops, so the final energy of the hoop will be, 
The work done by the hoop is equal to the change in kinetic energy as :
W = -5.529 Joules
So, the work done by the hoop is equal to 5.529 Joules. Therefore, this is the required solution.
