What are the most basic building blocks of all organisms?
2 answers:
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Answer:
F= 56,1 N :
Explanation:
We apply Newton's first law for balancing forces system.
We take the x axis in the direction of the ramp with a 16.1° slope.
∑Fx= 0
∑Fx: algebraic sum of forces ( + to the right, - to the left)
Problem development:
Look at the free body diagram :
The only forces that act on the box are the weight and tension of the rope because there is no friction.
T: Rope tension (N)
W :Box weight (N)
∑Fx= 0
Tx-Wx=0
Tx =Tcos( 43.2°- 16.1°)= Tcos ( 27.1°)
Wx= W*sen 16.1°= m*g*sen 16.1°=18.4*9.8* sen 16.1° = 50N
Tcos ( 27.1°)-50=0
Tcos ( 27.1°) = 50
T = (50) / (cos ( 27.1°))
T = 56,1 N
T=F= 56,1 N
Answer:
(we need the mass of the astronaut A)
Explanation:
We can solve this by using the conservation law of the linear momentum P. First we need to represent every mass as a particle. Also we can simplify this system of particles by considering only the astronaut A with an initial speed of 0 m/s and a mass
and the IMAX camera with an initial speed
of 7.5 m/s and a mass
of 15.0 kg.
The law of conservation says that the linear momentum P (the sum of the products between all masses and its speeds) is constant in time. The equation for this is:
By the law of conservation we know that
For (final linear momentum) we need to treat the collision as a plastic one (the two particles stick together after the encounter).
So: