Answer:
Positive
Explanation:
Work is defined as the product of displacement of an object produced by the applied force and the component of force along that direction. Let us consider a situation in which the angle between the applied force and the displacement produced by it is at an angle θ. Let the magnitude of displacement be s and that of the applied force be F. Now, we have to find the component of force along the direction of the displacement. For that we have to resolve the force in to two components- one along the direction of displacement and other perpendicular to it. Since the angle between force and displacement is θ, the component of force along the direction of displacement will be Fcosθ and that perpendicular to it will be Fsinθ. Thus, b the definition of work, work done = Fcosθ x s = Fscosθ.
Now, coming to our question, the force here is gravitational force of attraction which is along downward direction. It is given in the question itself that the stone is falling down. Since the displacement and the applied force is along the same direction, angle between them, θ = 0.
Thus, work done = Fscosθ = Fscos0 = Fs (since cos0 =1)
Fs > 0
Thus, the work done is positive
Answer with Explanation:
We are given that
Spring constant=k=18 N/m
Amplitude,A=6.5 cm=
1m=100 cm
Number of oscillations=N=19
Time=t=18 s
Frequency=Number of oscillations per second=
Frequency=
1kg=1000g
Mass of the ball=410 g
Maximum speed of the ball=)
Maximum speed of the ball=
Hence, the maximum speed of the ball=0.43 m/s
The distance between the two balls at the given force is 0.7 m.
The given parameters;
- <em>mass of each ball, m = 0.8 kg</em>
- <em>gravitational force between the balls from sample problem C, F = 8.92 x 10⁻¹¹ N</em>
The distance between the balls is calculated by applying Coulomb's law as shown below;
Thus, the distance between the two balls is 0.7 m.
Learn more about Coulomb's law here: brainly.com/question/14270204
Answer:
Cost = $ 3,995
Explanation:
Let's start by looking for the energy consumed, which is the power over time
E = P t
The power is 65 W, the time is 12 h each day, in a period of 30 days the time is
t = 12 30 = 360 h
E = 65 360
E = 23,500 W h
We reduce to KW h
1 kW = 1000 W
E = 23.5 kW h
Let's use a direct ratio rule (rule of three) to find the cost
Cost = 23.5 17.0
Cost = 399.5 c
Cost = $ 3,995
Answer:
Therefore, an increase in the concentration of a reactant will lead to a decrease in the amounts of all reactants and an increase in the amounts of all products.
Explanation: