Your answer would be the;  <u>NET</u>  force on the object.   Refer to Newton's Laws of Forces and Motion.
Hope that helps!!!!!!!!!!!!!!!!                                        : )
 
        
                    
             
        
        
        
Answer:
The increase in the gravitational potential energy is 29.93 joules.
Explanation:
Given that,
Mass of the box, m = 2.35 kg
It is lifted from the floor to a tabletop 1.30 m above the floor, h = 1.3 m
We need to find the increase the gravitational potential energy. Initial it will placed at ground i.e. its initial gravitational potential is equal to 0. The increase in the gravitational potential energy is given by :


U = 29.93 Joules
So, the increase in the gravitational potential energy is 29.93 joules. Hence, this is the required solution.
 
        
             
        
        
        
Answer:
A
Explanation:
Pressure, temperature are measurable properties and they are also known as physical properties.
 
        
             
        
        
        
Answer:

ΔK = 2.45 J
Explanation:
a) Using the law of the conservation of the linear momentum:

Where:


Now:

Where  is the mass of the car,
 is the mass of the car,  is the initial velocity of the car,
 is the initial velocity of the car,  is the mass of train,
 is the mass of train,  is the final velocity of the car and
 is the final velocity of the car and  is the final velocity of the train.
 is the final velocity of the train.
Replacing data:

Solving for  :
:

Changed to cm/s, we get:

b) The kinetic energy K is calculated as:
K = 
where M is the mass and V is the velocity.
So, the initial K is:



And the final K is:




Finally, the change in the total kinetic energy is:
ΔK = Kf - Ki = 22.06 - 19.61 = 2.45 J