(a)
mass of the car: m=950 kg
Initial speed:
Final speed: (the car comes to rest)
distance:
We can find the acceleration by using the following SUVAT equation:
Re-arranging it and replacing the numbers, we find the acceleration
So now we can calculate the force using Newton's second law:
And the negative sign means the force is applied against the direction of motion.
(b)
In this case, the distance is different:
so, the acceleration in this case is
And so, the force applied in this case is
which is much larger than the force exerted in the previous exercise.
It communicates messages in many different ways, soothes the mind and also helps relieve stress from our everyday lives. It is a sound that is in a controlled and tuned type of matter, relying on frequency and pitch of the voice. Not only is basic sound important, but I believe music is crucial to human life as well.
What are you trying to say?
Answer:
A physical matter
Explanation:
A kind of matter with uniform physical properties
Answer:
Explanation:
moment of inertia of man
= mr² , m is mass of man and r is radius of table .
= 53 x 2.9²
=445.73
angular momentum of runner = mvr , v is velocity of runner .
53 x 3.6 x 2.9 = 553.32
angular momentum of turntable
= Iω , I is moment of inertia and ω is angular velocity of table .
= 76 x .2 = 15.2
Total angular momentum = 553.32 - 15.2
= 538.12
Let the common velocity when the runner comes to rest with respect to turntable be ω.
total moment of inertia of the system
= 445.73 + 76
= 521.73
Applying law of conservation of angular momentum
total initial angular momentum = final angular momentum
538.12 = 521.73 ω
ω = 1.03 rad /s .