Explanation:
It is given that,
Mass of object, m = 2 kg
Initial velocity, u = 3 m/s (east)
Final velocity, v = - 7 m/s (west)
The Impulse can be calculated using the change in momentum of an object i.e.
J = m(v-u)
J = -20 kg-m/s
So, the Impulse of this object is 20 kg-m/s but the direction is opposite. Hence, statement (1) is correct i.e. Student #1: "The impulse is equal to the change in momentum, which is (2 kg)(3 m/s + 7 m/s) = 20 kg m/s."
Answer:
I = 0.287 MR²
Explanation:
given,
height of the object = 3.5 m
initial velocity = 0 m/s
final velocity = 7.3 m/s
moment of inertia = ?
Using total conservation of mechanical energy
change in potential energy will be equal to change in KE (rotational) and KE(transnational)
PE = KE(transnational) + KE (rotational)
v = r ω
I = 0.287 MR²