<span>A. Work = integral of force across a path. Since the force is constant, just multiply them: force*distance = 200N * (1m*sin(30)) = 100 Nm = 100 J
B. Use Newton: F=ma. For this, we need to use the sum of all the forces, not just the work we apply on the books, but gravity and friction too. Constant velocity means zero acceleration, which means the sum of forces is zero. Draw a free body diagram with the three forces and you'll see that the uphill force = the downhil force =>
200N = NormalForce*Coefficient + Gravity*mass*sin(30)
200N = Gravity*mass*cos(30)*coef. + Gravity*mass*sin(30)
200N = 9.81*mass*(cos(30)*0.18 + sin(30))
mass = 200/(9.81*(cos(30)*0.18 + sin(30)))
m = 31.23 kg</span>
Answer:five times five is twenty five divded by 10 is 2.5 seconds of acceleration
Answer:
Explanation:
Assuming the crate does not lift above the ground and remains along the floor, then its acceleration will be in the horizontal direction. Therefore, we can use Newton's second law to find its acceleration:
where
is the net force on the crate along the x-direction
m is the mass of the crate
is the acceleration
Here we have:
m = 50.0 kg
is the component of the pulling force along the horizontal direction
Solving for the acceleration,
Answer: QUANTUM MECHANICAL MODEL OF THE ATOM.
Explanation:Edwin Schrodinger is an Australian Physicist,who proposed the Quantum mechanical model of an Atom,this theory helped to give a better understanding of Bohr's model.
According to Bohr's model,it is believed that electrons are concentrated around the circular shell of the Nucleus of an Atom which Edwin Schrodinger improved by proofing that the Behaviors of electrons around an the Nucleus of an Atom can be explained by the Mathematical representation of their waves.
<span>2Kg50m/
s2.5m/
s2<span>2m/
s2</span></span>