The velocity of projectile has 2 components, horizontal component vcosθ and vertical component vsinθ, where v is the velocity of projection and θ is the angle between +ve X-axis and projectile motion.
In case 1, θ = 90⁰
So horizontal component is vcos90 = 0
Vertical component at maximum height = 0
So velocity at maximum height = 0 m/s
In case 2, θ = 45⁰
So horizontal component is 141cos45 = 100m/s
Vertical component at maximum height = 0
So velocity at maximum height = 100 m/s
Answer:
Ft = 50.25 N
Explanation:
As you can see in the attached diagram, the angle θ is given by
tanθ = opp/adj
The opposite is the sag of distance 2 m and the adjacent is the half of the horizontal clothesline that is 20 m.
tanθ = 2/10
θ = tan⁻¹(2/10)
θ = 11.30°
There are two forces along the y axis, one is the F = mg acting downwards and the other is the Ftsinθ component of tension force in the string.
The sum of forces along y-axis is
5Ftsin(11.30) - mg = 0
Ft = mg/5sin(11.30)
Ft = 5*9.8/5sin(11.30)
Ft = 9.8/0.195
Ft = 50.25 N
Therefore, the magnitude of the tension on the ends of the clothesline is 50.25 N.
Answer:
Explanation:
An impulse results in a change of momentum
If the wagon and dog both stop, they must have had equal and opposite momentums
FΔt = mΔv
F = mΔv/Δt = m(v₁ - v₀)/(t₁ - t₀)
v₁ = t₀ = 0
F = m(v₀)/t₁
F = 55(2.1)/0.1 = 1155 N
We could have also figured the dog's initial velocity and used the dog's mass in the equation as well. Result would be identical.
Answer:
when it weighs 2kg it is 7.38
Explanation:
hope this helps
A kind of stimulus is that Optic flow. It occurs as spaceships in Star Wars accelerate to near-light speed and the stars appear to stream outward from the screen's Centre due to centripetal force.
providing the impression of forward momentum. The acceleration vector of an object undergoing UCM is always directed toward the centre because centripetal implies "towards the Centre."m Since the reference frame is spinning, centrifugal force—which is not a real force—occurs as a result of this motion. The centripetal force, which pushes the item in the direction of the circle's Centre and maintains uniform circular motion is called centripetal force, is the real driving force behind uniform circular motion.
The pattern of seemingly moving objects, surfaces, and edges in a visual scene that is brought on by the motion of the observer in relation to the scene is known as optical flow or optic flow. Another way to think of Optic flow is as the distribution of apparent motion velocities of brightness pattern in an image.
Learn more about centripetal force here
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