Answer:
Torque is 93 Nm anticlockwise.
Explanation:
We have value of torque is cross product of position vector and force vector.
A force of 38 N, directed 30° above the x axis in the x-y plane.
Force, F = 38 cos 30 i + 38 sin 30 j = 32.91 i + 19 j
A particle is located on the x axis 4.9 m and we have to find torque about the origin on the particle.
Position vector, r = 4.9 i
Torque, T = r x F = 4.9 i x (32.91 i + 19 j) = 4.9 x 19 k = 93.1 k Nm
So Torque is 93 Nm anticlockwise.
Answer:
A. put water in a container under the pot water will disappear from the container .
Answer:
t=0.417s
Explanation:
After the ball hits the racket it is in freefall(assume air resistance as negligible)
so a=-g
use
x-x0=v0t+1/2at^2
Plug in givens
20=50t-4.9t^2
Solve quadratic equation using quadratic formula
t= 0.417 seconds, (the other answer is extraneous because it is too big because in 1 second, the ball travels 50 meters)
The force the rod exerts on the ball at the given angle is determined as 3.94 N.
<h3>Force exerted on the rod by the ball</h3>
The force exerted is calculated as follows;
F = ma
F = mv²/r
F = mω²r
where;
- m is mass of the ball
- ω is angular speed of the ball
- r is radius of the path
r = 2cosθ
<h3>Angular speed when the ball moves 15 degrees</h3>
ωf² = ωi² + 2αθ
where;
- θ is angular displacement in radians, 15⁰ = 15 x π/180 rad
ωf² = (1)² + 2(2)(15 x π/180)
ωf² = 2.04
ωf = √2.04
ωf = 1.428 rad/s
F = mω²(2cosθ)
F = (1)(1.428)²(2 x cos15)
F = 3.94 N
Learn more about force here: brainly.com/question/12970081
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