1800-150-456-789
FlagBACK
Flag Thermal Physics> A ball of mass52. 4g is thrown from the g...
question mark

A ball of mass52. 4g is thrown from the ground into the air with an initial velocity of 16.3m/s at an angle of 27.4 with the horizontal. What are the values of its kinetic energy initially and just before it strikes the ground

Rubab syed , 5 Years ago
Grade 12th pass
anser 1 Answers
Umar Farooq

Last Activity: 5 Years ago

Its initial velocity u=16.3 (cos 27.4) i +16.3 (sin 27.4)j 
Initial kinetic energy KEinitial=0.5 mu2 = 0.5 x 0.0524 x 16.32 = 69.6 J
As there’s no force along horizontal direction vx=16.3 (cos 27.4)=14.47
vy= u (sin 27.4) + gT
T= 2u sin (27.4) /g
vy= 3u (sin 27.4)
v= 14.47 i + 22.5 j
v= 26.75
KEfinal =0.5 mv2 =0.5 x 0.0524 x 26.752=187.48 J
 

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

Other Related Questions on Thermal Physics

question mark
A container filled with a sample of an Idea gas at the pressure of 1.5atm. the gas is compressed isothermal ly to one fourth of its original volume. What is the new pressure of the gas?
Thermal Physics
0 Answer Available

Last Activity: 1 Year ago(s)

question mark
how do we know the electric field due to an electric dipole of dipole moment P at distance r from the centre of dipole is fiven by .. where theta is angle between p amd r vector..
Thermal Physics
0 Answer Available

Last Activity: 2 Year ago(s)

question mark
A A mole of helium gas initially at stp undergoes an isovolumetric process in which its pressure falls to half its initial value. The work done by gas is
Thermal Physics
0 Answer Available

Last Activity: 2 Year ago(s)

question mark
\t5000 J of heat are added to two moles of an ideal monatomic gas, initially at a temperature of 500 K, while the gas performs 7500 J of work. What is the final temperature of the gas? step by step please
Thermal Physics
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
Please help me with theanswer of this questionrelated to radiation graph
Thermal Physics
0 Answer Available

Last Activity: 2 Year ago(s)