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3 years ago

Hey help me and thanks in advance if you do

Physics

2 answers:

blsea [12.9K]3 years ago

3 0

P = W / t

2000 = 30000 / t

t = 30000/2000

t = 30/2

t = 15 seconds

Ganezh [65]3 years ago

3 0

Explanation:

work(w)=30000J

power(p)=2000W

time taken(t)=?

now,

p=w/t
t=w/p
t=30000/2000
t=15 sec

hope it helps.

<h2>stay safe healthy and happy.</h2>

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Ira Lisetskai [31]

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3 years ago

Consider f(x) = -4x2 + 24x + 3. Determine whether the function has a maximum or minimum value. Then find the

murzikaleks [220]

Answer:

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If $f (3) '' >0$ the function has a minimum

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the function has a maximum in $x=3$

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3 years ago

If an unknown element has a mass of 17 and contains 6 neutrons, how many protons does it have ?

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3 years ago

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Answer:

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3 years ago

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tia_tia [17]

Answer:

A:7.2 $ms^{-1}$

B:14.25 $ms^{-1}$

C:1.45 $sec$

D:10.3 $m$

E:2.9 $sec$

F:20.88 $m$

Explanation:

Let $v$ be the velocity and $\alpha$ be the angle between the velocity and ground.

Question A:

Horizontal component of velocity is given by $vcos(\alpha )$ .

So,horizontal component is $16\times cos(63)=16\times 0.45=7.2ms^{-1}$

Question B:

Vertical component of velocity is given by $vsin(\alpha )$ .

So,vertical component is $16\times sin(63)=16\times 0.89=14.25ms^{-1}$

Question C:

Time required is given by $\frac{\text{vertical component of velocity}}{g}}=\frac{14.25}{9.8}=1.45 seconds$

Question D:

Maximum height is given by $\frac{\text{vertical component of velocity}^{2}}{2g}}=\frac{203.06}{19.6}=10.3m$

Question E:

Time of flight is twice the time required to reach maximum height= $2\times 1.45=2.9 seconds$ .

Question F:

The distance between the player and ball after landing is called range and is given by $\text{horizontal component of velocity}\times \text{time of flight}=$ $7.2\times 2.9=20.88m$

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3 years ago

Hey help me and thanks in advance if you do​

Hey help me and thanks in advance if you do