Answer: The speed is not constant and the object is performing a non uniform circular motion
Explanation:
Let's begin by explaining that the centripetal force is proportional to the centripetal acceleration of an object moving in circular motion is given by the following equation:
Where:
is the velocity
is the radius of the circle
In uniform circular motion, <u>the centripetal acceleration vector is always perpendicular to the velocity vector</u>, hence, the speed (the magnitude of velocity vector) is constant.
However, if a component of the centripetal acceleration vector is not perpendicular (is parallel to the velocity vector): the speed is not constant, the net force acting on the object will not be perpendicular to its motion and we will be dealing with <u>non uniform circular motion.</u>
It is important to note that in this situation the motion needs a tangential force, as well. Being the tangential acceleration proportional to and the angular acceleration :
Answer:
zero
Explanation:
If the car is moving at a constant velocity then there cannot be any acceleration. Acceleration is any change in velocity over time. If velocity doesn't change, then there is no acceleration.
Answer:
Option C is correct.
Modulus of elasticity of the composite perpendicular to the fibers = (12 × 10⁶) psi
Explanation:
For combination of materials, the properties (especially physical properties) of the resulting composite is a sum of the fractional contribution of each material thay makes up the composite.
In this composite,
The fibres = 20 vol%
Aluminium = 80 vol%
Modulus of elasticity of the composite
= [0.2 × E(fibres)] + [0.8 × E(Al)]
Modulus of elasticity of the fibers = E(fibres) = (55 × 10⁶) psi. =
Modulus of elasticity of aluminum = E(Al) = (10 × 10⁶) psi.
But modulus of elasticity of the composite perpendicular to the fibers is given in the expression.
[1 ÷ E(perpendicular)]
= [0.2 ÷ E(fibres)] + [0.8 ÷ E(Al)]
[1 ÷ E(perpendicular)]
= [0.2 ÷ (55 × 10⁶)] + [0.8 ÷ (10 × 10⁶)]
= (3.636 × 10⁻⁹) + (8.00 × 10⁻⁸)
= (8.3636 × 10⁻⁸)
E(perpendicular) = 1 ÷ (8.3636 × 10⁻⁸)
= 11,961,722.5 psi = (11.96 × 10⁶) psi
= (12 × 10⁶) psi
Hope this Helps!!!