There are two of them:
1). The mass of the object;
2). The net of all forces acting on the object.
As soon as you know these two things, you have everything
you need to know to determine the object's acceleration.
Explanation:
Let us assume that the initial velocity is u. And, according to the kinematics,
s =
ut = s -
Putting the given values into the above formula as follows.
ut = s -
u = 9.93 m/s
Hence, the required height will be calculated as follows.
h =
=
= 5.03 m
Thus, we can conclude that security look for the raucous hotel guests at 5.03 m.
The answer is a. Hope this helps :)
Answer:
Explanation:
brooke speed, u = 9 km/h = 2.5 m/s
Jamail speed, v = 4 km/h = 1.11 m/s
Let Booke is at (0, 0) and Jamail is at 35 m. So, at time t, the position of Brooke is (2.5 t , 0 ) and Jamail is (- 1.11 t, 35)
Let l be the distance between them.
Distance at t = 5 s
L = 39.38 m
Differentiate with respect to time
Put t = 5 s
dL/dt = 0.127 m/s