The object has been falling for 6.63 seconds.
The formula to use is v = u + at
Step-by-step explanation:
Step 1:
It is given that the object is falling at a velocity of 65 m/s. The object has started falling at time t = 0 with zero initial velocity and accelerates due to earth's gravity. Due to the acceleration its velocity keeps increasing with time as it falls towards the earth.
Step 2:
The first equation of motion is v = u + at
u is the initial velocity
a is the earth's acceleration due to gravity
v is the velocity at time t
Step 3:
It is given that v = 65 m/s, a = 9.8 m/s² u = 0, we need to find t.
t = (v - u)/a -> (65 - 0)/9.8 = 6.63 s
Step 4:
Answer:
The object has been falling for 6.63 seconds.
The formula to use is v = u + at