Answer:
change in kinetic energy of the trolley is 53.91 J.
Explanation:
mass of the trolley, m = 5.0 kg
initial velocity of the trolley, u = 1.0 m/s
external force on the trolley, F = 25 N
time of force action, t = 0.75 s
The final velocity of the trolley at the end of 0.75 s is calculated as follows;
The change in kinetic energy of the trolley is calculated as;
Δ K.E = ¹/₂m(v² - u²)
Δ K.E = ¹/₂ x 5(4.75² - 1²)
Δ K.E = 53.91 J.
Therefore, change in kinetic energy of the trolley is 53.91 J.
Answer:
one or more cells
Explanation:
I need to have 20 characters to submit lol
The second answer is the correct response, as Pluto is found in the kuiper belt, and there are objects that are roughly the same size as Pluto.
Answer:
Explanation:
First Law of Motion: Law of Inertia.
An object in motion stays in motion unless an outside force is applied to the object to make it stop, and an object at rest will stay at rest unless an outside force is applied to make the object move.
Second Law of Motion: Law of Acceleration.
It explains the equation with force. Force is equal to mass times its acceleration. It also explains how mass can affect acceleration. They are inversely proportional. Mass can decrease acceleration.
Third Law of Motion: Law of Action-Reaction.
For every action that occurs on an object, an opposite reaction occurs. This explains how forces act in pairs, there is an action force and a reaction force.