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NeX [460]
3 years ago
12

How much power is developed in a car that can pull a 5000 N at a constant speed of 20 m/s?

Physics
1 answer:
egoroff_w [7]3 years ago
5 0

Answer:

YAYA MAN

Explanation:

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A zebra starts from rest and accelerates at 1.9 m/s, how far has the zebra gone after 5 seconds
Aliun [14]

Answer:

23.8 m

Explanation:

The distance travelled by the zebra can be calculated by using the equation:

d=ut+\frac{1}{2}at^2

where

u is the initial velocity

t is the time

a is the acceleration

For this zebra,

u = 0 since it starts from rest

a=1.9 m/s^2 is the acceleration

Substituting t = 5 s, we find the distance travelled by the zebra:

d=0+\frac{1}{2}(1.9)(5)^2=23.8 m

5 0
3 years ago
Which statements describe magnetic poles? Check all that apply.
lilavasa [31]

Answer:

what are the answer choices

Explanation:

4 0
3 years ago
Read 2 more answers
A spring with spring constant 15 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is
Lana71 [14]

Answer:

a

   m  = 0.169 \ kg

b

  |v_{max} |=  0.5653 \ m/s

Explanation:

From the question we are told that

    The  spring constant is  k =  14 \ N/m

     The  maximum extension of the spring is  A =  6.0 \ cm  =  0.06 \ m

     The number of oscillation is  n  =  30

      The  time taken is  t  =  20 \ s

Generally the the angular speed of this oscillations is mathematically represented as

           w = \frac{2 \pi}{T}

where T is the period which is mathematically represented as

     T  =  \frac{t}{n}

substituting values

     T  =  \frac{20}{30 }

     T  = 0.667 \ s

Thus  

       w = \frac{2 * 3.142 }{ 0.667}

       w =  9.421 \ rad/s

this angular speed can also be represented mathematically as

       w =  \sqrt{\frac{k}{m} }

=>   m  =\frac{k }{w^2}

substituting values

      m  =\frac{ 15 }{(9.421)^2}

      m  = 0.169 \ kg

In SHM (simple harmonic motion )the equation for velocity is  mathematically represented as

        v =  - Awsin (wt)

The  velocity is maximum when  wt = \(90^o) \ or \ 1.5708\ rad

     v_{max} = -  A* w

=>   |v_{max} |=  A* w

=>    |v_{max} |=   0.06 * 9.421

=>   |v_{max} |=  0.5653 \ m/s

5 0
3 years ago
What would happen if you added energy to solid bar of gold ?
kolezko [41]
Thats imposiblie u cant ad energy to gold bar

8 0
3 years ago
A force F acts on an object undergoing a displacement s, the force being oriented at an angle θ with respect to the displacement
Komok [63]

Answer:

a) The force is zero, or the displacement is zero, or the angle is 180 degrees

b) The kinetic energy, speed, and velocity of the particle change.

c) W1 = - W2

7 0
3 years ago
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