What does the y-intercept mean in a Period vs. Length graph?

A 2.0-kg silverware drawer does not slide readily. The owner gradually pulls with more and more force, and when the applied forc

topjm [15]

Answer: 0.45

Explanation:

First note that the body that causes the body to move is its moving force (Fm) which is 9.0N

Since the mass of the body is 2.0kg, the weight will be;

W= mg = 2×10

W= 20N

For static body, the frictional force (Ff) acting on the body is equal to the moving force (Fm) since both forces acts along the horizontal on the body.

Ff = Fm = 9.0N

The normal reaction (R) on the body will also be equal to its weight(W) since weight acts downwards and the reaction acts in the opposite direction (upwards).

R = W = 20N

Ff = nR taking 'n' as coefficient of static friction between the drawer and the cabinet.

9.0 = 20n

n = 9/20

n = 0.45

7 0

3 years ago

A projectile is shot horizontally at 23.4 m/s from the roof of a building 55.0 m tall. (a) Determine the time necessary for the

jeka94

(a) 3.35 s

The time needed for the projectile to reach the ground depends only on the vertical motion of the projectile, which is a uniformly accelerated motion with constant acceleration

a = g = -9.8 m/s^2

towards the ground.

The initial height of the projectile is

h = 55.0 m

The vertical position of the projectile at time t is

$y = h + \frac{1}{2}at^2$

By requiring y = 0, we find the time t at which the projectile reaches the position y=0, which corresponds to the ground:

$0 = h + \frac{1}{2}at^2\\t=\sqrt{-\frac{2h}{a}}=\sqrt{-\frac{2(55.0 m)}{(-9.8 m/s^2)}}=3.35 s$

(b) 78.4 m

The distance travelled by the projectile from the base of the building to the point it lands depends only on the horizontal motion.

The horizontal motion is a uniform motion with constant velocity -

The horizontal velocity of the projectile is

$v_x = 23.4 m/s$

the time it takes the projectile to reach the ground is

t = 3.35 s

So, the horizontal distance covered by the projectile is

$d=v_x t = (23.4 m/s)(3.35 s)=78.4 m$

(c) 23.4 m/s, -32.8 m/s

The motion of the projectile consists of two independent motions:

- Along the horizontal direction, it is a uniform motion, so the horizontal velocity is always constant and it is equal to

$v_x = 23.4 m/s$

so this value is also the value of the horizontal velocity just before the projectile reaches the ground.

- Along the vertical direction, the motion is acceleration, so the vertical velocity is given by

$v_y = u_y +at$

where

$u_y = 0$ is the initial vertical velocity

Using

a = g = -9.8 m/s^2

and

t = 3.35 s

We find the vertical velocity of the projectile just before reaching the ground

$v_y = 0 + (-9.8 m/s^2)(3.35 s)=-32.8 m/s$

and the negative sign means it points downward.

3 0

3 years ago

A muscle inserts 1.5 cm from the joint axis and exerts 300 N of force at an angle of pull of 60 degrees. How much torque is prod

Amanda [17]

Answer:

torque = 3.897 N-m

Explanation:

given data

force = 300 N

angle = 60 degree

distance = 15 cm

to find out

torque

solution

we will apply here torque formula that is given below

torque = force × sinθ × distance ...................1

put here all these value in equation 1

we get torque

torque = force × sinθ × distance

torque = 300 × sin60 × 1.5 × $10^{-2}$

torque = 300 × 0.8660 × 1.5 × $10^{-2}$

torque = 259.80 × 1.5 × $10^{-2}$

torque = 389.711 × $10^{-2}$

torque = 3.897 N-m

8 0

3 years ago

7. Convert 746 days to centuries.

timofeeve [1]

Answer: 0.0208 Centuries

Explanation:

There is 2.739*10^-5 centuries per 1 day.

We can take 746 days and multiply it by that 2.7 number to get how many centuries are in 746 days.

$746 *(2.793*10^{-5})$ = 0.0208 centuries

4 0

3 years ago

True or False: If the part you are designing is completely symmetric, you can complete the part by designing just half of the pa

Lana71 [14]

Given what we know, the statement that "if the part you are designing is completely symmetric, you can complete the part by designing just half of the part and using one mirror feature" is true.

<h3>Why is this statement true?</h3>

Symmetry is when something is exactly the same on either side.

This line can be drawn anywhere but is most commonly a vertical line splitting the object in question down the middle.

Since the object is identical on both sides, using a mirror to flip the completed half to the other side, will effectively give you the finished product.

Therefore, given that when something is entirely and perfectly symmetric it will be exactly the same on either side, it is true to say that by designing half of the end product and using a mirror effect to flip it to the other side, you can complete it.

To learn more about symmetry visit:

brainly.com/question/1597409?referrer=searchResults

5 0

2 years ago