A ball is thrown upward with
1 answer:
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Answer:
because the static friction is higher than the kinetic friction
Explanation:
Inertia is resistance to motion. Object resist changing its current motion or the rest position. This is the Newton's first law of motion
apart from this as the graph shows , the force needed to move when object at rest is higher than the force to change the motion of a moving body . this is because
<em>static friction > kinetic friction</em>
- static friction is the friction acts on a object resting on a rough surface
- kinetic friction is the friction acts on an object when it is moving on a rough surface
Answer:
ω = 0.436 rev/sec = 2.736 rad/sec
Explanation:
By definition, the angular acceleration is the rate of change of angular velocity, which is described by the following expression:
Solving for ωf :
ωf = ω₀ + α*t (assuming t₀ = 0)
Replacing by givens in the problem, ω₀ = 0.250 rev/s, t =0.207 sec, and α = 0.896 rev/s², we have:
ωf = 0.250 rev/s +( (0.896 rev/s²)*(0.207 s)) = 0.436 rev/sec
Expressed in rad/sec:
ωf