B.a push or pull(which of the following best describes force)
"Acceleration" means the rate at which velocity is changing.
If velocity is constant, then it isn't changing.
If velocity isn't changing, then acceleration is <em>zero</em>.
Answer:
a = 9.8 m/s²
Explanation:
Acceleration due to gravity on Earth is constant, which is 9.8 m/s²
Answer:
The electric field intensity is <u>30000 N/C.</u>
Explanation:
Given:
Magnitude of the point charge is, 
Distance of the given point from the point charge is, 
Electric field intensity is directly proportional to the magnitude of point charge and inversely proportional to the square of the distance of the point and the given charge.
Therefore, electric field intensity 'E' at a distance of 'd' from a point charge 'q' is given as:
Plug in 
. Solve for 'E'.
Therefore, the electric field intensity at a point 3 cm from the point charge is 30000 N/C.
We will individually calculate the Kinetic Energy of each of the carts and compare them
<u>Cart A:</u>
m = 1 kg , v = 3 m/s
KE = 1/2 mv²
KE = 9/2 = 4.5 J
<u>Cart B:</u>
m = 3 kg , v = 1m/s
KE = 1/2 mv²
KE = 3/2 = 1.5 J
<u>Cart C:</u>
m = 3 kg , v = 2 m/s
KE = 1/2 mv²
KE = 6 J
<u>Cart D:</u>
m = 4 kg , v = 2 m/s
KE = 1/2 mv²
KE = 2 J
Therefore, Cart C has the most Kinetic energy
