X and Y can almost be any number and long as the statement 'equal to' is true the equation is correct.
Answer:
He will need to work a minimum of 5 weeks
Step-by-step explanation:
1,200-400=800
800 divded by 160=5
Answer:
2 hours
Step-by-step explanation:
30×1=30
30×2=60
The change in kinetic energy of the system is 200 J
Kinetic energy is the energy that an object possesses as a result of its motion.
It is given by:
Kinetic energy = (1/2)m[v - u]²
Where m is the mass of the object, v is the final velocity and u is the initial velocity.
Given that m = 16 kg, v = 20 m/s, u = 25 m/s, hence:
Kinetic energy = (1/2) * 16 * (20 - 25)² = 200 J
The change in kinetic energy of the system is 200 J
Find out more at: brainly.com/question/12669551
