Answer:
C. The final kinetic energy is equal to the initial potential energy.
Explanation:
Based on the Principle of energy conservation:
Sum of the Initial Energy = Sum of the Final Energy
Initial Kinetic Energy + Initial Potential Energy = Final Kinetic Energy + Final Potential Energy..........(1)
Since according to the question:
Initial Kinetic Energy = 0
Final Potential Energy = 0
The equation (1) above reduces to
Initial Potential Energy = Final Kinetic Energy
I took the test on Plato and got it correct. The answer is ecesis.
Answer:
Explanation:
horizontal component of velocity of throw = 20 cos20 = 18.8 m /s
vertical downwards component = 20 sin20 = 6.84 m /s
time to displace by height 30 m = t , initial velocity u = 6.84 m /s
h = ut + 1/2 gt²
30 = 6.84 t + .5 x 9.8 t²
4.9 t² + 6.84 t - 30 = 0
t = - 6.84 ±√( 6.84² + 4 x 4.9 x 30 ) / 2x 4.9
= - 6.84 ±√( 46.78 + 588 ) / 9.8
= - 6.84 ±√(634.78 ) / 9.8
= - 6.84 ±25.2 / 9.8
= 1.87 s
horizontal displacement in 1.87 s
= 18.8 x 1.87
= 35.15 m .
Answer:
Explanation:
5 C = 278 K
25 C = 298 K
V1 / T1 = V2 / T2
1.5L / 278 K = V2 / 298 K
V2 = (1.5L * 298) / 278
V2 = 1.61 L
46.58m/s²
26.43kg
Explanation:
Given parameters:
Force = 67N force = 185N
Mass = 1.43kg acceleration = 7m/s²
Unknown:
Acceleration = ?
mass of the object = ?
Solution:
According to newton's second law of motion "the net force on a body is a product of its mass and acceleration".
Force = mass x acceleration;
For the first problem;
the unknown is the acceleration;
Acceleration = = = 46.58m/s²
Using the same law, to find the mass of the second object, we make it the subject of the formula;
mass =
mass = = 26.43kg
learn more:
Newton's laws brainly.com/question/11411375
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