Answer:
a. Value of MA is always lesser than VR because mechanical advantage decreases due to the friction and weight of moving parts of the machine.
b.Efficiency of lever is never 100 or more because it will always lose some tiny (sometimes immeasurable) percentage of power due to the lever bending.
c.Because it helps to apply more torque.
d.Because the upright snip has the blades rotated 90° from the handles.
e.because some of the input work is used to overcome friction.
f.because the load arm is always longer than effort arm.
g.because the effort arm is always longer than load arm of these Lever.
h. because if the effort distance is greater than load distance there will be magnification of force and the metals could easily cut.
i. because the wheelbarrow's wheel and axle help the wheelbarrow to move without friction thus making it easier to push or pull.
Answer:
True
Explanation:
The centripetal force is directed towards the center of the circle at any moment. Also, the acceleration.
- Centripetal force is a force needed to keep an object along the curved path of a circular body.
- A motion in a curved path requires a force directed towards to center to keep it.
- A constant force is require to maintain the acceleration of a body along this path.
Answer:
Explanation:
Pinhole camera is a simple camera. It does not have a lens. The light passes from a hole and an inverted image is formed on the opposite side of the box.
The correct answer is that it converts mechanical energy to electrical energy.
