Two forces, a 60.-newton force east and an 80.-newton force north, act concurrently on an

Physics

1 answer:

11Alexandr11 [23.1K]3 years ago

4 0

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A loop of wire lays flat on a horizontal surface in an area with uniform magnetic field directed vertically down. Magnetic field

zimovet [89]

Answer:

B. counterclockwise

Explanation:

We shall apply Lenz's law to find direction of induced current . According to it , direction of induced current is such that the magnetic field produced by it will try to nullify the change in magnetic field that produces it. Increase in magnetic field in down ward direction is producing it so to nullify it , magnetic field induced will be in upward direction. For it current induced will be anticlockwise.

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3 years ago

The missile s engine exerts a 260-kN force F.

alexdok [17]

Answer:

a)F=(208 i+156 j) kN

b)F+W=219 kN

Explanation:

Solution:

To determine the components of F

F=(260 kN).( $\frac{4}{\sqrt{4^{2}+3^{2}}}i+\frac{3}{\sqrt{4^{2}+3^{2}}}j$ )

=(208 i+156 j) kN

F=(208 i+156 j) kN

b)weight W expressed in component and add into the

Force F.

W=-(8800 kg).(9.81 m/s^2)j

F+W=(208 i+[156-86.3]j) kN

F+W= $\sqrt{(208kN)^{2}+(-69.7kN)^{2} }$

=219 kN

F+W=219 kN

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3 years ago

1. Why are some countries so poor while others are so rich?

irina [24]

Answer:

It depends on how much resources a country has.

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2 years ago

A rock is thrown upwards and has a max altitude of 40 m. What was its initial velocity?

Natali [406]

Recall the formula,

${v_f}^2-{v_i}^2=2a\Delta x$

where $v_i$ and $v_f$ are the rock's initial and final velocities, respectively; $a$ is its acceleration; and $\Delta x$ is the displacement it undergoes.

At any point during its motion, the rock is subject to gravity, so $a=-g$ , where $g=9.80\frac{\rm m}{\mathrm s^2}$ . At its maximum height, the rock has zero vertical velocity, and if we take its starting height to be the origin, we have $\Delta x=x_{\rm max}$ .