A 6.8 kg bowling ball and 7.4 kg bowling ball rest on a rack 0.74 m apart. What is the force of gravity pulling each ball toward
1 answer:
The gravitational force between the two balls is
Explanation:
The magnitude of the gravitational force between two objects is given by:
where :
is the gravitational constant
m1, m2 are the masses of the two objects
r is the separation between the objects
For the balls in this problem, we have
r = 0.74 m
Substituting into the equation, we find the gravitational force between the two balls:
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Answer:
New speed of the wave, v = 5.77 m/s
Explanation:
It is given that,
Mass of the object, m = 5 kg
Length of the wire, L = 2 m
Speed of the wave, v = 10 m/s
The speed of wave in terms of tension is given by :
If the wire is replaced with one with the same length but three times as heavy, the mass per unit length is given by :
New speed of the wave is given by :
v' = 5.77 m/s
So, the speed of the new wave is 5.77 m/s. Hence, this is the required solution.
Complete question:
A force F is applied to the block as shown (check attached image). With an applied force of 1.5 N, the block moves with a constant velocity.
Approximately what applied force is needed to keep the box moving with a constant velocity that is twice as fast as before? Explain
Answer:
The applied force that is needed to keep the box moving with a constant velocity that is twice as fast as before, is 3 N
Force is directly proportional to velocity, to keep the box moving at the double of initial constant velocity, we must also double the value of the initially applied force.
Explanation:
Given;
magnitude of applied force, F = 1.5 N
Apply Newton's second law of motion;
F = ma
The applied force needed to keep the box moving with a constant velocity that is twice as fast as before;
Therefore, the applied force that is needed to keep the box moving with a constant velocity that is twice as fast as before, is 3 N
Force is directly proportional to velocity, to keep the box moving at the double of initial constant velocity, we must also double the value of the applied force.
