Answer:
166.8 m
30.18 m/s
Explanation:
u = Velocidad inicial del automóvil = 120 km/h =
v = Velocidad final = 0
s = Desplazamiento
a = Aceleración
t = Tiempo tomado = 10 s
De las ecuaciones cinemáticas de movimiento tenemos
La distancia que tarda el automóvil en detenerse es 166.8 m
Ahora s = 30 m
La velocidad a la que el otro automóvil sería golpeado es 30.18 m/s.
Answer:
force exert horizontally is 1 N
Explanation:
given data
bar length = 3.7 m
mass = 4.5 kg
rope length = 6.7 m
to find out
force exert horizontally
solution
we know here bar length and rope length that make angle θ
so here cos θ = (3.7/6.7)
so equating the torque here to find force in horizontal direction is
Fx = T cos θ .........1
and in vertical direction
Tsinθ + N = mg .............2
so here
we consider equilibrium condition
so
Fx = 0
T cos θ = 0
T 3.7 / 6.7 = 0
T = 6.7/3.7
T = 1.81
so from equation 1
Fx = T cosθ
Fx = 1.81 ( 3.7/6.7)
Fx = 1 N
so force exert horizontally is 1 N
Answer:1) Via heat: ferromagnet materials will lose their magnetism if heated above a point known as the Curie temperature. ... With a strong enough magnetic field of opposite polarity, it is therefore possible to demagnetize the magnet [whether this comes from another permanent magnet, or a solenoid].
Explanation:Unlike permanent magnets, temporary magnets cannot remain magnetized on their own. Soft magnetic materials like iron and nickel will not attract paper clips after a strong external magnetic field has been removed.To restore a permanent magnet, you need to cool the metal (if heated) and expose it to a magnetic field. Coil your copper wire tightly around the piece of metal you would like to restore as a permanent magnet.
Answer: she will do double the work
Explanation:
100N×200m= 20000