Answer:
400watts
Explanation:
Power is defined as the amount of energy expended in a specific time. It is also defined as the change in work done with respect to time.
Mathematically,
Power = Workdone/time
Work done = Force×distance
Power = Force × Distance/Time
Given force = mass× acceleration due to gravity
Force = 60×10 = 600N
Distance covered = 4.0m
Time taken = 6.0seconds
Power expended = 600×4/6
Power expended = 400Watts
The average mechanical power (in W) required to do this is 400Watts
When someone fails to wear a seat belt the passenger becoming a projectile the force a person will be subjected to for a passenger weighting 100 pounds, and the car is traveling at 60 mph would be the same as 6000 pounds. thats like hitting a brick wall. so is other words put ur seat belt on.
hope this helped (:
In,radioactive decay,the half-life is the length of time after which there is a 50 percent chance that an atom will have undergone nuclear decay.It varies depending on the atom type and isotope,and is usually determined experimentally.
Answer:
The spring constant required = 949.2 N/m
Explanation:
The energy stored in the spring is converted to kinetic energy of the projectiles fired.
Energy stored in spring's = kx²/2
Kinetic energy of bullets = mv²/2
k = spring constant = ?
x = maximum compression of the spring = 8 cm = 0.08 m
m = mass of projectiles fired = 3.0 g = 0.003 kg
v = velocity of projectiles fired = 45.0 m/s
kx² = mv²
k (0.08²) = 0.003 (45²) = 6.075
k = 949.2 N/m
The spring constant required = 949.2 N/m