The net horizontal force acting on the cart is 169.85 N.
The change in the carts momentum is 5,000 Ns.
The net horizontal force on Zanele is same as the net horizontal force on the cart.
If angle between the 500N force and the horizontal is decreased, the final velocity of the cart increases.
The given parameters:
- Mass of zanele, m1 = 40 kg
- Mass of the cart, m2 = 20 kg
- Applied force, F = 500 N, at angle 20 degrees
- Frictional force on the cart, Ff = 300 N
- Time, t = 10 s
<h3>Net horizontal force on the cart;</h3>
- The net horizontal force acting on the cart is calculated as follows;

<h3>Change in momentum;</h3>
- The change in the carts momentum at the given time of applied force is calculated as follows;

The net horizontal force on Zanele is same as the net horizontal force on the cart.
<h3>The final velocity of the cart;</h3>
- When the angle decreases the cart's final velocity would be affected as follows;

Thus, if angle between the 500N force and the horizontal is decreased, the final velocity of the cart increases.
Learn more about net horizontal force here: brainly.com/question/21684583
<span>The last option.
Plants absorb carbon dioxide from the atmosphere, water from the soil and other nutrients also from the soil - salts containing nitrogene, potassium, sulphur, etc. They use water and carbon dioxide to produce sugar through photosyntesis.
Decomposition is the reaction that converts any organic compound back into inorganic compounds - water, carbon dioxide and salts containing nitrogene, potassium, sulphur, etc. So it's basically the opposite.
So photosyntesis uses carbon dioxide as a reactive and take it from the atmosphere, whereas decomposition generates carbon dioxide as a product and releases it to the atmosphere.</span>
solution:
the utmost height would be comprehensive while y'(t)=0. (on the suitable of the trajectory, the y speed is 0.)
Answer:
The energy in one kilowatt-hour is 
Explanation:
Given that,
Power = 1 kW
Time = 1 hour
One kilowatt-hour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied for a time of one hour
We need to calculate the energy
Using formula of energy

Where, P = power
t = time
Put the value into the formula


Hence, The energy in one kilowatt-hour is 
To find the time it takes for the ball to reach the given height, we need an equation that relates the height and time it travel which is given to be <span>h=-16t^{2}+56t. We just substitute the height of 49 feet then solve for t. We do as follows:
</span><span>h=-16t^{2}+56t
49 = </span>-16t^{2}+56t
t = 1.75 seconds
Hope this answers the question. Have a nice day.