Answer:
projectiles
electromagnetic
Answer:
Explanation:
física cuántica y Quantum Moves
Answer:
v = 3.951 m/s
Explanation:
Given that,
Mass of a ball, m = 6.5 kg
Radius of the circle, r = 0.9 m
Angular speed of the ball,
Let v is the tangential speed of the ball. It is given in terms of angular speed is follows :
So, the tangential speed of the ball is 3.951 m/s.
area of 0.1 m², how much force is needed to raise the customer?
STEP 1: List the known
and unknown values F =
A=
A,
STEP 2: Write the
correct equation
STEP 3: Insert the
known values into the
equation to solve for
the unknown value
Answer:
15N
Explanation:
F¹=150N
A=0.01m2²
F2=?
A2=0.1m²
P=F/A
F1/A2=F2/A1
150/0.1=F2/0.01
7.) True or False: "Courtney is traveled 5 miles in 3 hours" is an example of
acceleration.
True
False
Answer:
Wavelength = 0.66 meters
Explanation:
Given the following data;
Speed = 330 m/s
Frequency = 500 Hz
To find the wavelength;
Mathematically, wavelength is calculated using this formula;
Substituting into the equation, we have;
Wavelength = 0.66 meters
The minimum angle that the ladder make with the floor before it slips is 51.34 Degree.
Given data:
The weight of ladder is, W = 100 N.
The length of ladder is, L = 8.0 m.
The coefficient of static friction between ladder and floor is, .
Apply the Newton' law in vertical direction to obtain the value of Normal Force (P) as,
And force along the horizontal direction is,
Now, taking the torque along the either end of ladder as,
Solving as,
Thus, we can conclude that the minimum angle that the ladder make with the floor before it slips is 51.34 Degree.
Learn more about the frictional force here:
Answer:
The minimum angle is 51.34°
Explanation:
Given that,
Weight of ladder = 100 N
Length = 8.0 m
Coefficient of static friction = 0.40
We need to calculate the normal force
Using Newtons law in vertical direction
We need to calculate the normal force
Using Newtons law in horizontal direction
We need to calculate the minimum angle
Using torque about the point A then
Put the value into the formula
Hence, The minimum angle is 51.34°
Answer:
-847.2J
Explanation:
First find the acceleration from v^2= u^2 + 2as
v= 2.5 m/s
u= 1.3 m/s
a???
s=6.00
a= v^2-u^2/2s
a= (2.5)^2-(1.3)^2/2× 6
a= 0.38ms^-2
From Newtons second law:
(Force applied cos Θ) - (Frictional force) = ma
Frictional force = ma- (Force applied cos Θ)
Frictional force= (18.8×0.38) - (165 cos 26°)
Frictional force= 7.144- 148.3= -141.2N
Therefore,
Work done by friction = Frictional force × distance covered
= -141.2N × 6= -847.2J
Answer:
W = –847J
Explanation:
Given m = 18.8kg, F = 165N, θ = -26° (below the horizontal, s = 6.0m, u = 1.30m/s and v = 2.50m/s
In this problem, two forces act on the chair; the forward force F and the frictional force f. We would apply newton's second law to find the frictional force f after which we can calculate the workdone by the frictional force f×s.
But for us to apply newton's second law, we need to know the acceleration of the chair cause by the net force.
From constant acceleration motion equations
v² = u² + 2as
2.5² = 1.30² + 2a×6
6.25 = 1.69 +12a
12a = 6.25 – 1.69
12a = 4.56a
a = 4.56/12
a = 0.38m/s
By newton's second law the net sum of forces equals m×a
The force F has horizontal and vertical and components. It is the horizontal component of this force that pushes the chair against friction.
Fx and f are oppositely directed.
So
Fx – f =ma
165cos(-26) – f = 18.8×0.38
148.3 – f = 7.14
f = 148.3 – 7.14
f = 141.2N
Workdone = -fs = –141.2×6.00 = –847J
W = –847J
Work is negative because it is done by a force acting on the chair in a direction opposite (antiparallel) to that of the intended motion.