Can someone answer my last question you could get 25 points total

A 52 N sled is pulled across a cement sidewalk at constant speed. A horizontal force of 36 N is exerted. What is the coefficient

Andre45 [30]

Answer:

μ = 0.692

Explanation:

In order to solve this problem, we must make a free body diagram and include the respective forces acting on the body. Similarly, deduce the respective equations according to the conditions of the problem and the directions of the forces.

Attached is an image with the respective forces:

A summation of forces on the Y-axis is performed equal to zero, in order to determine the normal force N. this summation is equal to zero since there is no movement on the Y-axis.

Since the body moves at a constant speed, there is no acceleration so the sum of forces on the X-axis must be equal to zero.

The frictional force is defined as the product of the coefficient of friction by the normal force. In this way, we can calculate the coefficient of friction.

The process of solving this problem can be seen in the attached image.

5 0

2 years ago

A car moves in a circular motion and it is subject to a centripetal acceleration of 24 m/s2. If the radius of the circular path

Softa [21]

Answer:

Explanation:

Centripetal acceleration is given by:

$a_{c} = v^{2}/r$

Thus, centripetal acceleration is inversely proportional to the radius. Thus, when radius will double, the centripetal acceleration will be halved.

3 0

3 years ago

How can I answer question 19? please help me, I need the answer now

Crank

The spring starts out 22 cm long with nothing hanging on it.

Hanging 35 newtons of weight on it stretches the spring 1 meter.

Ellen is going to hang 250 grams of mass on the spring.
What's the weight of 250 grams of mass ?

   Weight = (mass) x (acceleration of gravity in the place where the mass is) .

On Earth, the acceleration of gravity is 9.8 m/s² .
250 grams is 0.25 of a kilogram.

Weight of 250 grams = (0.25 kilogram) x (9.8 m/s²)

   =    (0.25 x 9.8) kg-m/s²

   =    2.45 newtons .

2.45 newtons of weight is (2.45 / 35) of 35 newtons,
so it'll stretch the spring (2.45 / 35) of a meter.

   2.45/35 = 0.07 of a meter = 7 centimeters.

The spring was 22 cm long with nothing hanging on it,
and the 250-gm weight stretched it 7 cm.
So with the weight hanging on it, it's (22 + 7) = 29 cm long.

6 0

2 years ago

a delivery truck travels 18 blocks north, 10 blocks east, and 16 blocks south. what is the distance traveled and displacement.

AleksAgata [21]

1) Distance: 44 blocks

2) Displacement: 10.2 blocks at $11.3^{\circ}$ north of east

Explanation:

1)

- Distance is a scalar quantity that gives a measure of the total length of the path travelled by an object, regardless of its direction

- Displacement is a vector quantity which connects the initial position to the final position of motion of the object. Being a vector, it has both magnitude and direction: the magnitude is the shortest distance between initial and final position, while the direction goes from the initial to the final position.

In this problem, the motion is:

18 blocks north

10 blocks east

16 blocks south

So, the distance is the sum of the distances covered in each part:

distance = 18 + 10 + 16 = 44 blocks

2)

The displacement can be calculated by evaluating the initial and the final position. Along the north-south direction, the displacement is

$d_y = 18 (n) - 16 (s) = 2$ blocks north