Answer:
» 30 N
Explanation:
<u>Given</u> :
Mass → m → 6kg
Acceleration → a →
<u>To</u><u> </u><u>find</u> :
The formula for force
F = m • a
F = 6 • 5
F = 30 N
(BELOW YOU CAN FIND ATTACHED THE IMAGE OF THE SITUATION)
Answer:
Explanation:
For this we're going to use conservation of mechanical energy because there are nor dissipative forces as friction. So, the change on mechanical energy (E) should be zero, that means:
(1)
With the initial kinetic energy, the initial potential energy, the final kinetic energy and the final potential energy. Note that initialy the masses are at rest so , when they are released the block 2 moves downward because m2>m1 and finally when the mass 2 reaches its maximum displacement the blocks will be instantly at rest so . So, equation (1) becomes:
(2)
At initial moment all the potential energy is gravitational because the spring is not stretched so and at final moment we have potential gravitational energy and potential elastic energy so , using this on (2)
(3)
Additional if we define the cero of potential gravitational energy as sketched on the figure below (See image attached), and we have by (3) :
(4)
Now when the block 1 moves a distance d upward the block 2 moves downward a distance d too (to maintain a constant length of the rope) and the spring stretches a distance d, so (4) is:
dividing both sides by d
, with k the constant of the spring and g the gravitational acceleration.
Distance is 50 km
Displacement is 10 km
<u>Explanation:</u>
Given:
Distance toward south, x = 25 km
Distance towards west, y = 10 km
Distance towards north, z = 15 km
(a) Total distance, D = ?
Total distance, D = x + y + z
D = 25 + 10 + 15
D = 50km
(b) Displacement, d = ?
Displacement = final position - initial position
= 10 - 0 km
= 10km
Answer:
Explanation:
r = Radius = 2.7 cm
F = Force =
A = Area =
= Stress =
E = Young's modulus =
= Strain
= Original length = 67 cm
= Change in length
Young's modulus is given by
Strain is
Strain is given by
The cylinder height decreases by