Answer:
a = 1.16 m/s²
Explanation:
In order to find the acceleration of the ball we will use 3rd equation of motion.
2as = Vf² - Vi²
where,
a = acceleration = ?
s = displacement = 21.9 m
Vf = Final Velocity = 7.14 m/s
Vi = Initial Velocity = 0 m/s (Since, ball starts from rest)
Therefore, using the values, we get:
2a(21.9 m) = (7.14 m/s)² - (0 m/s)²
a = (50.97 m²/s²)/(43.8 m)
<u>a = 1.16 m/s²</u>
I'm pretty your it's magnetism though. Like magnets
Answer:
274N 0.41
Explanation:
As he is sliding down in a constant speed then the force that accelerates him (weight) and the force that slows his down (friction) are equal.
then
<em>friction=mass x gravity x sin(21)</em>
Fr=78kg x 9.8m/s2 x sin(21)=274N
<em>friction= coefficient of kinetic friction x normal force of from the slope</em>
Fr= u x 78kg x 9.8m/s2 x cos(21)=274N
Fr= u x 78kg x 9.8m/s2 x cos(21)=274Nu=274/677=0.41
The main factors that affect the strength of an electromagnet are: Number of turns on the coil of wire around the core. Strength of the current applied. The material of the coil.
Answer:
Section: 4–1 Topic: Newton's First Law: The Law of Inertia Type: Conceptual ... B) whether an object is at rest or is moving with constant velocity depends on the ... E) The acceleration of a body is proportional to the net external force acting on it ... The position vector at t = 2 s is. A) jm im r ˆ0.5ˆ0.1. +. = D) jm im r. ˆ0.10ˆ0.2. +.
Explanation:
