Answer:
1/4 of a pound or 4 ounces
Explanation:
4.00 = 1 pound (= 16 oz)
4.00 / 16 oz = 4
16 /4 = 1/4 or 4 ounces
The only vertical forces are weight and normal force, and they balance since the surface is horizontal. The horizontal forces are the applied force (uppercase F) in the direction the block slides and the frictional force (lowercase f) in the opposite direction.
Apply Newton's 2nd Law in the horizontal direction:
ΣF = ma
F - f = ma
where f = µmg
F - µmg = ma
F = m(a +µg)
F = (20 kg)(1.4 m/s² + 0.28(9.8 m/s²)
F = 83 N
Answer:
x=2.4t+4.9t^2
Explanation:
This equation is one of the kinematic equations to solve for distance. The original equation is as follows:
X=Xo+Vt+1/2at^2
We know that the ball starts at rest meaning that its initial velocity and position is zero.
X=0+Vt+1/2at^2
Since it is going down the ramp, you can use the acceleration of gravity constant. (9.81 m/s^2) and simplify that with the 1/2.
X=Vt+4.9t^2
Note: Since the positive direction in this problem is down, you are adding the 4.9t^2, but if a question says that the downward direction is negative, you would subtract those values.
Now, substitute in your velocity value.
X=2.4t+4.9t^2
Answer:
(a) X- axis represent (1/P) inverse of pressure
(b) Y-axis represent (V) volume
Explanation:
Boyle's Law States that at constant temperature, the volume of a fixed mass of gas is inversly proportional to its pressure. It can be expressed mathematically as
V α 1/P
VPα1
removing the proportionality sign and introducing a constant
VP = k
V₁P₁ = V₂P₂
Where V₁ and V₂ are initial and final volume respectively, P₁ and P₂ are initial and final pressure respectively.
If the graph for Boyle's law is straight line through the origin,
(a) X-axis represent (1/P) inverse of pressure
(b) Y- axis represent (V) volume.
Kinematics is the branch of Physics that deals with
the mathematical methods of describing motion.
