A stone of mass 2kg is dropped from a height of 50m.its K.E after two seconds will be...? a:9.8J b:19.6J c:39.6J d: none
Sure - Here we will use the Kinetic Energy formula: K = .5*(mass)*(velocity)
before we to that, however, we need to determine the velocity of the object...since it is free-falling, then it's velocity after 2 seconds will be: v=gt = (9.81)*(2) = 19.62 m/s
Back to out KE equation: K = .5*2*19.62 = 19.62 J
The answer is b.
I'm quite proficient in physics. Please feel free to contact me directly for assistance in the future. Thanks.
Content will be erased after question is completed.
Enter the email address associated with your account, and we will email you a link to reset your password.
Forgot your password?