5. A certain spring that obeys Hooke's Law stretches 30 cm when a load of 0.35 N is added to it. How much energy is stored in th e spring when it is compressed 5.0 cm?
1 answer:
Answer:
Energy stored in the spring when compressed 5.0 cm = 0.00146 J = 1.46 mJ
Explanation:
According to Hookes law,
F = kx
where F = force or load applied = 0.35 N
k = spring's constant = ?
x = extension or compression of the spring = 30 cm = 0.3 m
0.35 = k × 0.3
k = 0.35/0.3 = 1.167 N/m
Energy stored in a spring = kx²/2
k = 1.167 N/m, x = 5 cm = 0.05 m
Energy stored in the spring = (1.167)(0.05²)/2 = 0.00146 J = 1.46 mJ
You might be interested in
The Momentum Calculator uses the formula p=mv, or momentum (p) is equal to mass (m) times velocity (v).
Answer:
No
Explanation:
walking requires friction because if friction did not exist we would slide around without stopping
Answer:
a) 1.68 N b) 0 c) 14.5º
Explanation:
a)
The force on a charge moving in a magnetic field, is a vector perpendicular to the plane defined by the velocity of the charge and the magnetic field. The magnitude of the force F is given by the following expression:
where q= magnitude of the charge of the particle, v=velocity of the particle, B= magnitude of the magnetic field, and θ= angle between v and B. Replacing by the known values in (1) we have:
The maximum possible value of F happens when sin θ =1 This means that v and B are perpendicular each other (in the same plane) So, Fmax = 1.68 N b)
If the maximum possible value of F happens when sin θ = 1, the minimum possible is when sin θ = 0. In this case, when v and B are parallel each other, the force is just 0. c)
If the force is 0.25 of the maximum possible, (which is when sin θ =1), this means that sin θ = 0.25, as it can be seen below:
The angle between the velocity v and the magnetic field B is 14.5º.
i just took the test and its c
Answer:
usually x-ray tube filaments are devices that limit the current flow i.e. current cannot easily pass through them or we can say that they are current limited devices. So to allow fine electron transmission control by filament heating current, rhenium must not be used in x-ray tube filaments.