Answer:
Explanation:
information we have:
mass: 
lenght: 
frequency: 
time: 
and from the information we have we can calculate the angular velocity 
. which is defined as
----------------------------
Now, to calculate the torque
We use the formula
where 
is the moment of inertia and 
is the angular acceleration
moment of inertia of a uniform rod about the end of it:
substituting known values:
for the torque we also need the acceleration which is defined as:
susbtituting known values:
and finally we substitute and into the torque equation :
Red shirt appears red because:
a. The shirt reflects red light
Answer:
10 m/s
Explanation:
∑F = ma
T = m v² / r
10 N = (1 kg) v² / (10 m)
v = 10 m/s
Answer:
The horizontal force the sprinter exerts on the starting blocks is 705 N
Explanation:
Given;
mass of the sprinter, m = 47 kg
magnitude of the his horizontal acceleration, aₓ = 15 m/s²
The horizontal force the sprinter exerts on the starting blocks to produce this acceleration, is calculated by applying Newton's second law of motion.
∑Fₓ = maₓ
∑Fₓ = 47 x 15
∑Fₓ = 705 N
Therefore, the horizontal force the sprinter exerts on the starting blocks is 705 N
