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3 years ago

Gravitational forces is ------ force

Physics

1 answer:

mel-nik [20]3 years ago

7 0

Answer:

Gravitational force is <u>noncontact</u> force

Explanation:

Contact force occurs due to the contact between two different objects. Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects. There is no field linked with the contact force. ... Gravitational force is an example of a non-contact force.

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PLEASE HELP! If the period of a mass spring oscillator is 8π s and the spring constant is 2 N/m, how much mass is attached?

xxTIMURxx [149]

The period of a mass-spring system is:

T = 2π $\sqrt{m/k}$

T = period, m = mass, k = spring constant

Given values:

T = 8π s

k = 2 N/m

Plug in and solve for m:

8π = 2π $\sqrt{m/2}$

$\sqrt{m/2}$ = 4

m/2 = 16

m = 32 kg

Choice A

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3 years ago

A cannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 30 m/s. Ideally (no air r

NikAS [45]

As we know that here no air resistance while ball is moving in air

So here we will say that

initial total energy = final total energy

$KE_i + U_i = KE_f + U_f$

here we know that

$Ui = U_f = 0$ (as it will be on ground at initial and final position)

so we will say

$KE_i = KE_f$

since mass is always conserved

so we will say that final speed of the ball must be equal to the initial speed of the ball

so we have

$v_f = v_i = 30 m/s$

5 0

3 years ago

Calculate their sine function values

Stells [14]

Sine value is defined in the following way

Explanation:

In a right triangle, the sine of an angle is the length of the opposite side divided by the length of the hypotenuse. Try this Drag any vertex of the triangle and see how the sine of A and C are calculated. The sine function, along with cosine and tangent, is one of the three most common trigonometric functions.

Let's start with the basic sine function, f (t) = sin(t). This function has an amplitude of 1 because the graph goes one unit up and one unit down from the midline of the graph. This function has a period of 2π because the sine wave repeats every 2π units.

Trigonometric sine calculator.

Sine calculator

In order to calculate sin(x) on the calculator:

Enter the input angle.

Select angle type of degrees (°) or radians (rad) in the combo box.

Press the = button to calculate the result.

3 0

3 years ago

A 0.537-kg basketball is dropped out of a window that is 5.88 m above the ground. The ball is caught by a person whose hands are

jeka57 [31]

Answer:

a) 20.54 J

b) 30.97 J

c) 10.43 J

d) -20.54 J

Explanation:

m = Mass

g = Acceleration due to gravity = 9.81 m/s²

h = Height

$W=mgh\\\Rightarrow W=0.537\times 9.81\times (5.88-1.98)\\\Rightarrow W=20.54\ J$

Work done by the ball's weight is 20.54 J

$W=mgh\\\Rightarrow W=0.537\times 9.81\times (5.88)\\\Rightarrow W=30.97\ J$

Gravitational potential energy of the basketball, relative to the ground, when it is released is 30.97 J

$W=mgh\\\Rightarrow W=0.537\times 9.81\times (1.98)\\\Rightarrow W=10.43\ J$

Gravitational potential energy of the basketball, relative to the ground, when it is released is 10.43 J

Change in gravitational potential energy

$\Delta U=10.43-30.97=-20.54\ J$

Change in gravitational potential energy is given by -20.54 J

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4 years ago

A ____________ is the measure of how far the particles in the medium move away from their normal rest position. a. wave b. ampli

sp2606 [1]

Amplitude.

is your answer mate

6 0

3 years ago

Gravitational forces is ------ force​

Gravitational forces is ------ force