A worker drops a wrench from the top of a tower 95.0 m tall.?
What is the velocity when the wrench
strikes the ground? The acceleration of gravity is 9.81 m/s2. Round to the nearest hundredth place. Answer in units of m/s.
- MyRankLv 61 month ago
Height (h) = 95m
Velocity (v) = ?
Acceleration due to gravity (g) = 9.81m/sec²
Using conservation of Energy:-
Potential Energy (P.E) = Kinetic Energy (K.E)
= mgh = ½mv²
= 2gh = v²
= velocity (v) = √2gh = √(2 x 9.81 x 95)m²/sec²
= 43.17m/sec ≈ 43.2m/sec
∴ velocity (v) = 43.2m/sec.Source(s): http://myrank.co.in/
- Anonymous1 month ago
conservation of energy shall apply :
m*g*h = m/2*V^2
mass m cross
V = √2*g*h = √9.806*95*2 = 43.16 m/sec