All categories

3 years ago

Please help will make brainlist.

Physics

2 answers:

nata0808 [166]3 years ago

7 0

Answer:

the box should be 1 N

Explanation:

forces are equal left and right, and up and down. hope that helped, sorry if its wrong...

Greeley [361]3 years ago

4 0

The answer is 1N. It also gets friction from the sand.

You might be interested in

A spring with spring constant of 26 N/m is stretched 0.22 m from its equilibrium position. How much work must be done to stretch

Evgen [1.6K]

Answer:

1.503 J

Explanation:

Work done in stretching a spring = 1/2ke²

W = 1/2ke²........................... Equation 1

Where W = work done, k = spring constant, e = extension.

Given: k = 26 N/m, e = (0.22+0.12), = 0.34 m.

Substitute into equation 1

W = 1/2(26)(0.34²)

W = 13(0.1156)

W = 1.503 J.

Hence the work done to stretch it an additional 0.12 m = 1.503 J

8 0

3 years ago

When you look at yourself in a convex mirror, you appear to be ¼ your actual size. If you are standing 1.0 m in front of the mir

Nookie1986 [14]

Answer:

The focal length is $f = -0.2 \ m$

The radius of curvature is $R = -0.4 \ m$

Explanation:

From the question we are told that

The magnification of the mirror is $m = \frac{1}{2}$

The distance of the person from the mirror(the object distance ) is $u = - 1.0 \ m$

The negative sign shows that it is been placed in front of the mirror

Generally the magnification of the mirror is mathematically represented as

$m = \frac{v}{u}$

=> $\frac{1}{4} = \frac{v}{-u}$

=> $v = \frac{- 1}{4}$

Generally from the lens equation we have that

$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$

=> $\frac{1}{f} = \frac{1}{-1 } + \frac{1}{-\frac{1}{4} }$

=> $f = -0.2 \ m$

Generally the radius of curvature is mathematically represented as

$R = 2 * f$

=> $R = 2 * - 0.2$

=> $R = -0.4 \ m$

8 0

3 years ago

Predict the date of the next full moon.

lapo4ka [179]

Answer:

The 19th

Explanation:

going based off of the calandar, you just start from the 4 at the bottom and then just count up as you go through it agains starting back at the top.

4 0

3 years ago

Read 2 more answers

A 17Kg sitting on a shelf has a potential energy of 350J. How high is the shelf? Round your number to the nearest whole number

saul85 [17]

Answer:

${ \bf{potential \: energy = mass \times gravitation \times height}} \\ 350 = 17 \times 10 \times h \\ 350 = 170h \\ height = 2.06 \: metres$

6 0

3 years ago

The tape in a videotape cassette has a total

xxMikexx [17]

Answer:

$w=19.76 \ rad/s$

Explanation:

<u>Circular Motion </u>

Suppose there is an object describing a circle of radius r around a fixed point. If the relation between the angle of rotation by the time taken is constant, then the angular speed is also constant. If that relation increases or decreases at a constant rate, the angular speed is given by:

$w=w_o+\alpha \ t$

Where $\alpha$ is the angular acceleration and t is the time. If the object was instantly released from the circular path, it would have a tangent speed of:

$\displaystyle v_t=w.r$

We have two reels: one loaded with the tape to play and the other one empty and starting to fill with tape. They both rotate at different angular speeds, one is increasing and the other is decreasing as the tape goes from one to the other. We'll assume the tangent speed is constant for both (so the tape can play correctly). Let's call $w_1$ the angular speed of the loaded reel and $w_2$ that from the empty reel. We have