A stationary 2.17-kg object is struck by a stick. The object experiences a horizontal force given by F = at - bt ², where t is the time in seconds from the instant the stick first contacts the object. If a = 1,500,000 N/s and b = 20,000,000 N/s², what is the speed of the object just after it comes away from the stick at t = 2.55 x 10-3 s? %3D

Q: E. 25 m Q.14: A 2-kg particle moving horizontally with a speed of 5 m/s strikes ( ) a vertical wall…

A: Initial velocity (u) = 5 msFinal velocity (v) = -5 mstime of contact (t) = 2 ms mass (m) = 2 kg

Q: Att = 0, force F (- 3.80i + 5.20j + 3.10k ) N begins to act on a 2.90 kg particle with an initial…

A: F→ = -3.80i^ + 5.20j^ + 3.10k^ N d→ = 1.80i^ + 2.10j^ + 6.90k^ m m = 2.90 kg vi = 3.60 m/s vf = ?

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A: Given: mass of bungee jumper, m = 78 kg  distance fallen, S = 15 m

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A: Force is defined as the rate of change of momentum.        F= dP/dt  P= m*v

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A: The acceleration is given by  v =u + at  The force is given by  F =m a

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A: Negative sign indicates that the cannon is moving in opposite direction as that of the cannon-ball.

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A: The ball's mass is, m=1.2 kg The change in the velocity of a ball is, Δv=10--25 m/s=35 m/s The time…

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Q: In a classic comedy gag, a clown gets a pie thrown at their face. The pie weighs 0.9097 kg and flies…

A: mass (m) = 0.9097 kg initial velocity (u) = 2.91 msfinal velocity (v) = 0 mstime (t) = 621ms= 0.621…

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A: Givenv=0.15 m/s2m2 is moving upwardm1=3.3 kgand m2=4.4 kg

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.