3 years ago

How far can a person run in 15 seconds if she runs at an average speed of 160 cm/s? State your answer in meters.

Physics

1 answer:

uysha [10]3 years ago

8 0

Answer: distance = 24 meters

Explanation:

speed = distance / time

distance = speed x time

speed = 160 cm/s = 1.6 m /s [ 100 cm = 1 m, 160 cm = 1.6 m ]

time = 15 s

distance = 1.6 m/s x 15 s = 24 m

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Please answer and thanks

allsm [11]

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3 years ago

What is the speed of a car with mass of 200kg and acceleration of 5

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f=200*5
force = 1000 Newtons

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3 years ago

Over a span of 6.0 seconds, a car changes its speed from 89 km/h to 37 km/h. What is its average acceleration in meters per seco

natka813 [3]

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A coil of wire with 50 turns lies in the plane of the page and has an initial area of 0.250 m2. The coil is now stretched to hav

Oxana [17]

Answer:

The induced emf in the coil is 170 volt and its direction is clockwise direction.

Explanation:

Given that,

Number of turns of a coil, N = 50

Initial area, $A_i=0.25\ m^2$

Final area, $A_f=0$

Time, t = 0.1 s

The magnetic field points into the page and has a strength of 1.36 T.

We need to find the magnitude and direction of the average value of the induced emf. Due to change in area of the coil and emf will be induced in it. The induced emf is given by :

$\epsilon=-N\dfrac{d\phi}{dt}\\\\\text{since}\ \phi=BA\\\\\epsilon=-N\dfrac{d(BA)}{dt}\\\\\epsilon=-NB\dfrac{A_f-A_i}{dt}\\\\\epsilon=-50\times 1.36\dfrac{0-0.25}{0.1}\\\\\epsilon=170\ V$

So, the induced emf in the coil is 170 volt and its direction is clockwise direction. Hence, this is the required solution.

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Shtirlitz [24]

The answer is letter B

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2 years ago

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