Answer:
density = 5520 kg/m^3
Explanation:
given that
radius of earth = 6378 km
G = 6.67 x 10⁻¹¹ m³/kg.s²
g = 9.80 m/s²
we know,

mass of earth


M = 5.972 x 10²⁴ kg
density =
V = volume of the earth = 4/3πr³
V = 4/3 x 3.14 x (6378 x 10³)³
V = 1.08 x 10²¹ m³
density = 
density = 5.52 x 10³ kg/m^3
density = 5520 kg/m^3
Hey I thought we were going out tonight but we are going out to dinner with the girls and we will go back together lol I have a nice weekend and we will go aback lol I love it so I can go get my food and I can eat tonight and go back home.
Answer:
<em>a. The cart's acceleration is 2 m/s^2</em>
<em>b. The cart will travel 100 m</em>
<em>c. The speed is 20 m/s</em>
Explanation:
a. The acceleration of the cart can be calculated using Newton's second law:
F = m.a
Solving for a:

The cart has a mass of m=15 Kg and is applied a net force of F=30 N, thus:


b.
Now we use kinematics to find the distance and speed:

The cart starts from rest (vo=0). The distance traveled in t=10 seconds is:


The cart will travel 100 m
c.
The final speed is calculated by:

The speed is 20 m/s
Answer:
c.holding a sign in the air
Explanation:
because b is kinetic energy and a is also kinetic energy