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A baseball hit by a bat with an average force of 1000 N accelerates at 4.0 x 103 m/s2.
What is the ball’s mass?
A container ship with a displacement of 15,200 T and is sailing at 20 knots and comes to a stop after 0.75h. What is the work done on the container ship if it covers a stopping distance of 3,125 m?
Calculate the force of gravity that the Earth (mass 6.0 x 1024 kg) and the Moon (mass 7.4 x 1022 kg) exert on each other. The average Earth-Moon distance is 3.8 x 108 m.
Large freight trains accelerates slowly. Suppose one such train accelerates from rest, giving its 0.350meter radius wheels angular acceleration of 0.250 rad/s². After the wheel have made 200 revolutions (assume no slippage):
How far has the train moved down the track?
. The acceleration of a particle P moving in a straight line is (t
2 − 9t + 18)ms−2
,
where t is the time in seconds.
(a) Find the values of t for which the acceleration is zero.
(b) It is given that when t = 3 the velocity of P is 9ms−1
.Find the velocity of P when t =0
(c) Show that the direction of motion of P changes before t = 1.
Spring constant of 0.13Kn/M. Solve the stretched (x) by forces. F1= 52 N
A ball is thrown straight up in the air. What happens as the ball travels upward?
option : Acceleration is negative and velocity is negative.
In a shipping company distribution center, an open cart of mass 50.0 kg is rolling to the left at a speed of 5.00 m/s. You can ignore friction between the cart and the floor. A 15.0 kg package slides down a chute that is inclined at 37° from the horizontal and leaves the end of the chute with a speed of 3.00 m/s. The package lands in the cart and they roll off together. If the lower end of the chute is a vertical distance of 4.00 m above the bottom of the cart, what are the speed of the package just before it lands in the cart and what is the final speed of the cart?
378 𝑙𝑝𝑠 of air is isothermally compressed at 27℃ and 1379 𝑘𝑃𝑎𝑎; 𝑝2 = 4136 𝑘𝑃𝑎𝑎. For both nonflow and steady-flow (𝑉1 = 23 𝑚 𝑠, 𝑉2 = 46 𝑚 𝑠, ∆𝑃 = 0) processes, compute (a) ∫ 𝑝𝑑𝑉 𝑎𝑛𝑑 − ∫ 𝑉𝑑𝑝 (b) ∆𝑈, ∆𝐻, 𝑎𝑛𝑑 ∆𝑆 (c) 𝑊 𝑎𝑛𝑑 𝑄
