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Sveta_85 [38]
4 years ago
11

A m=7.2 gram object is accelerated at a rate of a=2.9 m/s^2. What force (in millinewtons) does the object experience? No need to

add the unit (already given).
Physics
1 answer:
yulyashka [42]4 years ago
8 0

Answer:

20.88 mN

Explanation:

given data:

mass of object = 7.2 gm

acceleration of object = 2.9 m/s2

we know that force is given as

F = ma

where m is mass of object and a is acceleration of moving object.

putting all value to get required force

    = 7.2*10^{-3}\ kg *2.9 m/s2

   = 20.88*10^{-3} N

force in milli newton is

  = 20.88*10^{-3} * 1000 = 20.88 mN

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Ghella [55]

Por the impulse, use the formula:

I = F * t

Now, we know:

4000 N = 4000 kg*m/s²

Replacing we have:

I = 4000 kg*m/s² * 0,200 s

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I = 800 kg.m/s²

The impulse is <u>800 kg.m/s²</u>

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Identify the element X in the following nuclear reactions: (a) H+Be → X + n; (Hint: See Appendix E.)
nikklg [1K]

Answer:

Boron

Explanation:

(a)

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By conserving the charge,

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I forgot to post the pic<br>But please help<br>just need answers​
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14.    23,000g to 90,000g

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3 years ago
Seema knows the mass of basketball. What other information is needed to find the balls potential energy
Lelu [443]

Answer: The height (position) of the ball and the acceleration due gravity

Explanation:

In this case we are taking about gravitational potential energy, which is the energy a body or object possesses, due to its position in a gravitational field.  In this sense, this energy depends on the relative height of an object with respect to some point of reference and associated with the gravitational force.  

In the case of the Earth, in which the gravitational field is considered constant, the gravitational potential energy U will be:  

U=mgh  

Where:

m is the mass of the ball

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8 0
4 years ago
Read 2 more answers
A uniform solid sphere rolls down an incline. A) What must be the incline angle (deg) if the linear acceleration of the center o
Nonamiya [84]

Answer:

a) θ = 12.12°

b) equal to 0.21g

Explanation:

Solution:-

Declare variables:

- The mass of solid sphere, m

- The inclination angle, θ

- The linear acceleration a down the slope of the solid sphere is a = 0.21g

Where, g: The gravitational acceleration constant.

- The component of weight of solid sphere directed down the slope is given by:

                          Ws = m*g*sin ( θ )

- Apply Newton's second law of motion down the slope, state:

                        F_net = m*a

- The only net force acting on the solid sphere is the Weight. So, the equation of motion in the coordinate axis ( down the slope ).

                        Ws = m*a

                        m*g*sin ( θ ) = m*0.21*g

- Solve for inclination angle ( θ ):

                        sin ( θ ) = 0.21

                        θ = arcsin ( 0.21 )

                        θ = 12.12°

- If a friction-less block of mass ( m ) moves down the same slope then block has weight component down the slope as:

                         Wb = m*g*sin ( θ )

- Apply Newton's second law of motion down the slope, state:

                        F_net = m*a

- The only net force acting on the solid sphere is the Weight. So, the equation of motion in the coordinate axis ( down the slope ).

                        Ws = m*a

                        m*g*sin ( θ ) = m*a

- Solve for linear acceleration ( a ):

                        g*sin ( θ ) = a

                        a = sin ( 12.12 ) * g

                        a = 0.21g

Answer: The acceleration is independent of mass and only depends on the inclination angle θ.

7 0
4 years ago
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