Answer:
264,600J
Explanation:
Gpe = mgh, knowing that the acceleration due to gravity,g, is 9.8N/kg.
Answer: Northwest.
Explanation:
After the collision the second object which was at rest would change its direction and move towards the Northwest. The object in motion was coming from the east and traveling towards the west, where it deflects against a stationery object which changes its direction to southeast. And the object which was at rest moves toward the northwest.
Answer:
h=4r
Explanation:
To solve the problem it is necessary to apply the energy conservation equations for the roller coaster.
The energy conservation equations warn that:
Where,
Kinetic Energy
Potential Energy
Equating,
Re-arrange for V,
For balance of forces, according to the announcement, those who are on a roller coaster can withstand up to a maximum of 9g.
Therefore, considering the centripede speed and the speed of the fall, we obtain that,
The centripetal acceleration is given by the equation
Where
V = Tangencial velocity
r = Radius
Then replacing in the equation of Force,
Therefore the maximum height of the incline if the cars starts from the rest is 4 times the raidus of the inclination
Explanation:
Young' modulus is the ratio of normal stress to the longitudinal strain. Mathematically, it is given by :
Normal stress is given by force per unit area. Longitudinal strain is the change in length per unit original length.
The mathematical definition of Young's modulus is given by :
..........(1)
Where
is the change in length
F is the force
A is the area of cross section
So, the Young's modulus refers to the change in length of the object. Hence, the correct option is (b) "length".