(Missing figure is here: https://www.physicsforums.com/attachments/ch05-p070-jpg.149243/ )
Let's call
and
the masses of the two blocks. We can write Newton's second law for both blocks (sum of all forces acting on the block = ma). On block 1, we have two forces: the weight
pointing downwards and the tension of the string T poiting upwards. On block 2, we have the tension of the string going right and the friction
going left. Therefore
Summing the two equations, we find
and then using
we can find the acceleration:
Work is force times
distance. <span>
The distance is 1.3 m/s x 7.6 s = 9.88 m </span>
<span>
the force is only sufficient force to overcome friction.
Assuming the table is a level table, the force to overcome friction is µ x
normal force = 0.6 x (12 kg) x 9.8 m/s^2 = 70.56 N </span>
<span>
So the work is 70.56 N x 9.88 m = 697.13 J
<span>The power is simply the work / time = 697.13 J / 7.6 s = 91.7
or 92 Watts </span></span>
Answer:
The gravitational attraction between the two objects is
Explanation:
According to universal law of gravitation, the gravitational force of attraction acting between two objects will be directly proportional to the product of mass of the objects and inversely proportional to the square of the distance of separation of two objects.
Here G is the gravitational constant, M, m are the masses of the objects given as 6564300 kg and 5640 kg. And r is the distance of separation given as 50 m.
So 
So the gravitational attraction of 0.988 mN will be acting between the two objects.
KE = 1/2 x mass x velocity^2
KE = 1/2 x 271 x 25
KE = 1/2 x 6775
KE = 3387.5 J
Answer:
1,3,5
Explanation:
i think maybe dont come at me
