Answer:
Explanation:
Given
mass of boy ![m_b=70.9\ kg](https://tex.z-dn.net/?f=m_b%3D70.9%5C%20kg)
mass of girl ![m_g=43.2\ kg](https://tex.z-dn.net/?f=m_g%3D43.2%5C%20kg)
speed of girl after push ![v_g=4.64\ m/s](https://tex.z-dn.net/?f=v_g%3D4.64%5C%20m%2Fs)
Suppose speed of boy after push is ![v_b](https://tex.z-dn.net/?f=v_b)
initially momentum of system is zero so final momentum is also zero because momentum is conserved
![P_i=P=f](https://tex.z-dn.net/?f=P_i%3DP%3Df)
![0=m_b\cdot v_b+m_g\cdot v_g](https://tex.z-dn.net/?f=0%3Dm_b%5Ccdot%20v_b%2Bm_g%5Ccdot%20v_g)
![v_b=-\frac{m_g}{m_b}\times v_g](https://tex.z-dn.net/?f=v_b%3D-%5Cfrac%7Bm_g%7D%7Bm_b%7D%5Ctimes%20v_g)
![v_b=-2.82\ m/s](https://tex.z-dn.net/?f=v_b%3D-2.82%5C%20m%2Fs)
i.e. velocity of boy is 2.82 m/s towards west
Insulin and glucagon help maintain blood glucose levels
Answer:
Obesity changes in the structure and function of the heart. It increases your risk of heart disease. The more you weigh, the more blood you have flowing through your body. The heart has to work harder to pump the extra blood.
Explanation:
Answer:
a = -4/5 m/s^2
Explanation:
Acceleration = change in velocity / time
change in velocity = final velocity - initial velocity
a = (20 m/s - 60 m/s) / 50 s
a = -40 m/s / 50 s
a = -4/5 m/s^2
hope this helps! <3