# physics

A ball thrown with a speed of 100m/s,attains a height of 150m (g is 9.8m/s2.Calculate (i) time of flight (ii)angle of projection

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1. Hi Abdul,time of flight can be calculated by (2h/g)^1/2 which comes to be 30.6s.

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2. how electron and proton can deflect with same radius

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3. Usama, what type of deflection you are talking about. Deflection in an electrical or magnetic field?

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4. Y^2 = Yo^2 + 2g*h.
0 = Yo^2 + (-19.6)*150,
Yo = 54.2 m/s = Initial ver. component.

1. Y = Yo + g*Tr.
0 = 54.2 -9.8Tr,
Tr = 5.53 s. = Rise time.
Tf = Tr = 5.53 s. = Fall time.
Tr+Tf = 5.53 + 5.53 = 11.1 s. = Time of flight.

2. Vo = 100m/s[Ao].
Yo = 100*sin A,
54.2 = 100*sin A,
A = 32.8o.

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