Hi Pupil Here's your answer ::
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They are always balanced forces since if they are applied on an object the resultant of tgese forces on the object is Zero
So, the option A is the correct. They are always balanced forces.
An outfielder throws a 1.1 kg baseball at a speed of 62 m/s and an initial angle of 12.3 ◦ . What is the kinetic energy of the b
1 answer:
Answer:
= 2,018.3 J
Explanation:
mass (m) = 1.1 kg
velocity (v) = 62 m/s
initial angle(θ) = 12.3°
kinetic energy =
where
- m is the mass
- v is the velocity, which has two components
v = Vx + Vy (horizontal component + vertical component)
at the maximum height, velocity is 0, so Vy = 0 and v= Vx
v = Vx = v.cosθ
v = 62 x cos 12.3 = 60.6 m/s
therefore kinetic energy = =
= 2,018.3 J
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Hi Pupil Here's your answer ::
➡➡➡➡➡➡➡➡➡➡➡➡➡
They are always balanced forces since if they are applied on an object the resultant of tgese forces on the object is Zero
So, the option A is the correct. They are always balanced forces.
Answer:
Explanation:
Unit conversions:
1890 km/h = 1890 km/h * 1000m/km * 1/3600 h/s = 525 m/s
5.2 km = 5200 m
Assume that the jets is traveling in perfect circular motion, we can calculate the centripetal acceleration of the motion:
where v = 525m/s is the velocity of the jet and r = 5200 is the radius of the arc
If the object is moving at a constant speed, acceleration is 0. So:
The resultant force is 0. So the force pushing the object must be equal to the friction force acting, so
Friction = 90 N
The resultant force is 0. So the force pushing the object must be equal to the friction force acting, so
Friction = 90 N