Answer:
A. 800 J
B. - 360 J
C. 440 J
Explanation:
Applied force, F = 200 N
Friction force, f = 90 N
Distance, d = 4 m
Work done = Force x distance x cos θ
where, θ be the angle between the force and distance.
A. W = Applied force x distance = 200 x 4 x cos0 = 800 J
B. W = frictional force x distance = 90 x 4 x cos 180 = - 360 J
C. Total work done = 800 - 360 = 440 J
Since Pluto was demoted to a dwarf planet, Mars became the planet where you would weigh the least.
Answer:
The first force that the bungee jumper experiences is gravity, which pulls down on everything and makes the jumper fall. The gravitational force is almost exactly constant throughout the jump. During the bungee jumper's fall, he or she also experiences a force due to air resistance.
Explanation:
The car that hit the dog and cat would win
Answer:
3.4 x 10^-4 T
Explanation:
A = 1.5 x 10^-3 m^2
N = 50
R = 180 ohm
q = 9.3 x 106-5 c
Let B be the magnetic field.
Initially the normal of coil is parallel to the magnetic field so the magnetic flux is maximum and then it is rotated by 90 degree, it means the normal of the coil makes an angle 90 degree with the magnetic field so the flux is zero .
Let e be the induced emf and i be the induced current
e = rate of change of magnetic flux
e = dФ / dt
i / R = B x A / t
i x t / ( A x R) = B
B = q / ( A x R)
B = (9.3 x 10^-5) / (1.5 x 10^-3 x 180) = 3.4 x 10^-4 T