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-Dominant- [34]
3 years ago
12

Define the moment of a force

Physics
1 answer:
Lelu [443]3 years ago
5 0

The moment of a force can be described by a force applied to the end of an object whose other end is attached to a pivot or hinge, the force will tend to rotate the object about the pivot and the force have a turning effect.

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If the moon disapared what affect would this have on earths tides
Free_Kalibri [48]
If the moon disapared what affect would this have on earths tides:
There would no longer be any tides.
The moon is what causes the push and the pull of waves.        
6 0
3 years ago
The line of action of the force \vec{F}=5\vec{i}-10\vec{j} F =5 i −10 j ​ N passes through the point with coordinates (in meters
Morgarella [4.7K]

Answer:

\tau = - 30 \hat k

Explanation:

Position vector of the point of application of point of application of force is given as

\vec r = 2\hat i + 2\hat j

now we have have force

\vec F = 5 \hat i - 10\hat j

now the moment of force is given as

\tau = \vec r \times \vec F

\tau = (2\hat i + 2\hat j) \times (5\hat i - 10\hat j)

\tau = -20\hat k - 10 \hat k

\tau = - 30 \hat k

5 0
3 years ago
A sanding disk with rotational inertia 1.2 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of 10 N·m a
tensa zangetsu [6.8K]

Answer:

Angular momentum = 0.7 kg.m²/s

Angular velocity = 583.3 rad/s

Explanation:

1. The torque τ  is related to the angular momentum L by the relation

τ = ΔL/Δt

ΔL = τΔt

τ = 10 N. m

Δt = 70 ms = 70 × 10⁻³s

ΔL = (10 N. m) × (70 × 10⁻³s) = 700 × 10⁻³ kg.m²/s = 0.7 kg.m²/s

2. The rotational inertia I relates the angular momentum L to the angular velocity w

L = Iw

w = L/I

L =  0.7 kg.m²/s

I = 1.2 × 10⁻³ kg.m²

w = (0.7 kg.m²/s)/(1.2 × 10⁻³ kg.m²) = 583.3 rad/s

4 0
3 years ago
A heater has a resistance of 10.0 Ω. It operates on a 12.0 V. What is the current through the resistor?
irakobra [83]

Answer:

1.2 amps :)

Explanation:

A heater has a resistance of 10.0 Ω. It operates on a 12.0 V. What is the current through the resistor?

         Known:

  • R = 10.0 Ω                            
  • V = 12.0 V

       Unknown:

  • I = ???

I = V/R

= 12.0 V / 10.0 Ω

= 1.2 amps

6 0
3 years ago
Which of the following explains why parallax is used to measure stars?
enyata [817]

D, it provides greater accuracy for measuring stars far from the earth.

7 0
3 years ago
Read 2 more answers
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