Answer:
Explanation:
The potential energy of an object is given by .
Recall that the weight of an object is equal to the force of gravity on the object. From this, we can set up the following equation and solve for the mass of the object:
Now we can plug in values to and solve:
.
Force = (mass) x (acceleration)
Mass = (force) / (acceleration)
There was 150N of force in one direction and 100N of 'force' in
the other direction. The net force on the object was (150 - 100) = 50N .
Acceleration = (change in speed) / (time for the change)
= (10 m/s) / (5s) = 2 m/s²
Mass = (net force) / (acceleration) = (50 N) / (2 m/s²) = 25 kilograms
All the forces are correct except that the counter-force in the 10.0 kg block must be 2*u*m1*g + u*m2*g. The reaction force from the friction of the 5.00 kg block is u*m1*g, and the friction force from the floor is u*(m1 + m2)*g.
The 5.00 kg block must be static. T1 = u*m1*g = 0.200*5*9.80 = 9.80 N.The net force of the 10.0 kg block is 45.0 - 2*0.20*5*9.80 - 0.20*10*9.80 = 5.80 N. Thus, the acceleration of the 10.0 kg block is 5.80 / 10 = 0.580 m/s^2.
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