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konstantin123 [22]
3 years ago
10

(m/s) 20 10. 100 -10 total distance

Physics
1 answer:
Sergio039 [100]3 years ago
8 0

Answer:

sum of them 4

Explanation:

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A child of mass 47 kg sits on the edge of a merry-go-round with radius 1.3 m and moment of inertia 56.3953 kg m2 . The merrygo-r
lakkis [162]

Answer:

F=156.416\ N the child have to exert this much amount of force radially to stay on the wheel.

Explanation:

Given:

mass of the child, m=47\ kg

radius of the merry-go round wheel, r=1.3\ m

moment of inertia of the wheel, I=56.3953\ kg.m^2

angular velocity of the wheel, \omega=1.6\ rad.s^{-1}

Since the child is sitting on the edge of the rotating wheel the child will feel and outward throwing force called centrifugal force.

Centrifugal force is mathematically given as:

F=m.r.\omega^2

F=47\times 1.3\times 1.6^2

F=156.416\ N the child have to exert this much amount of force radially to stay on the wheel.

4 0
3 years ago
A ball is thrown straight up into the air with a velocity of 12 m/s. Draw a motion diagram for the ball and then give as much qu
viktelen [127]

Answer:

find the diagram in the attachment.

Explanation:

Let vi = 12 m/s be the intial velocy when the ball is thrown, Δy be the displacement of the ball to a point where it starts returning down, g = 9.8 m/s^2 be the balls acceleration due to gravity.

considering the motion when the ball thrown straight up, we know that the ball will come to a stop and return downwards, so:

(vf)^2 = (vi)^2 + 2×g×Δy

vf = 0 m/s, at the highest point in the upward motion, then:

0 = (vi)^2 + 2×g×Δy

-(vi)^2  = 2×g×Δy

Δy = [-(vi)^2]/2×g

Δy = [-(-12)^2]/(2×9.8)

Δy = - 7.35 m

then from the highest point in the straight up motion, the ball will go back down and attain the speed of 12 m/s at the same level as it was first thrown

8 0
3 years ago
Good day can I get some help please?​
abruzzese [7]

Answer:

432 J

Explanation:

When moving linearly:

Kinetic Energy = (1/2)mV^2

So here you have:

KE=(1/2)(6)(12^2)=(1/2)(6)(144)=432

The unit for energy is Joules (J), so your answer would be 432 J.

8 0
3 years ago
What is the scientific method in physics ? <br><br>grade 9​
a_sh-v [17]
A method of investigation in which a problem is first identified and observations, experiments, or other relevant data are then used to construct or test hypotheses that purport to solve it.
5 0
3 years ago
What does a motion diagram represent? ​
Stels [109]

Answer:

A motion diagram represents the motion of an object by displaying its location at various equally spaced times on the same diagram. Motion diagrams are a pictorial description of an object's motion. They show an object's position and velocity initially, and present several spots in the center of the diagram.

Explanation:

^

6 0
3 years ago
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