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3 years ago

A motorcycle is moving at a constant speed of 4 km/h. How long does it take the motorcycle to travel a distance of 10 km

Physics

2 answers:

shepuryov [24]3 years ago

8 0

Answer:

It takes 2.5 hours, or 2 hours and 30 minutes

Explanation:

The tone it takes can be find dividing the distance it need to travel by the velocity:

10/4 = 2.5

Klio2033 [76]3 years ago

8 0

Answer:

2.5 hrs

Explanation:

S=d/t

4km/hr=10km/t

=2.5hr

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Lerok [7]

Answer:

The near point of an eye with power of +2 dopters, u' = - 50 cm

Given:

Power of a contact lens, P = +2.0 diopters

Solution:

To calculate the near point, we need to find the focal length of the lens which is given by:

Power, P = $\frac{1}{f}$

where

f = focal length

Thus

f = $\frac{1}{P}$

f = $\frac{1}{2}$ = + 0.5 m

The near point of the eye is the point distant such that the image formed at this point can be seen clearly by the eye.

Now, by using lens maker formula:

$\frac{1}{f} = \frac{1}{u} + \frac{1}{u'}$

where

u = object distance = 25 cm = 0.25 m = near point of a normal eye

u' = image distance

Now,

$\frac{1}{u'} = \frac{1}{f} - \frac{1}{u}$

$\frac{1}{u'} = \frac{1}{0.5} - \frac{1}{0.25}$

$\frac{1}{u'} = \frac{1}{f} - \frac{1}{u}$

Solving the above eqn, we get:

u' = - 0.5 m = - 50 cm

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3 years ago

Suppose a free-fall ride at an amusement park starts at rest and is in free fall. What is the velocity of the ride after 2.3 s?

horsena [70]

Answer:

V = a * t = 9.8 m/s^2 * 2.3 s = 22.5 m/s velocity after 2.3 s

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3 years ago

a tennis ball is thrown straight up with an initial velocity of 22.5 m/s how much total time is the ball in the air

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Answer:

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