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zlopas [31]
2 years ago
5

A ball rolls from x=3.85m to x=22.1m in 5 seconds. What was its average velocity

Physics
1 answer:
Vadim26 [7]2 years ago
3 0

Answer:

Average Velocity = 3.65 m/s

Explanation:

Average Velocity  =\frac{Total   Displacement}{Total     Time} =\frac{22.1-3.85}{5}=\frac{18.25}{5}=3.65

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What force is needed to accelerate a 0.5kg football at a rate of 40m/s
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Describe and name the different types of collision. In which are the linear momentum and kinetic energy conserved
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2. Inelastic collision    

Explanation:

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8 0
3 years ago
The plane of a rectangular coil, 7.2 cm by 3.7 cm, is perpendicular to the direction of a uniform magnetic field B. If the coil
netineya [11]

Answer:

The rate of change of magnetic field is 2.23 T/s.              

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Given that,

Dimension of rectangular coil is 7.2 cm by 3.7 cm.

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We need to find the rate of change of magnetic field in the coil. The induced emf is given by the rate of change of magnetic flux. So,

\epsilon=-\dfrac{d\phi}{dt}

Ohm's law is :

\epsilon=IR

So,

IR=-\dfrac{d\phi}{dt}\\\\IR=-\dfrac{d(NBA)}{dt}\\\\IR=-NA\dfrac{dB}{dt}\\\\\dfrac{dB}{dt}=\dfrac{IR}{NA}\\\\\dfrac{dB}{dt}=\dfrac{0.05\times 12.4}{104\times 7.2\times 10^{-2}\times 3.7\times 10^{-2}}\\\\\dfrac{dB}{dt}=2.23\ T/s

So, the rate of change of magnetic field is 2.23 T/s.

4 0
3 years ago
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