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1. ### Physics, how to do(a), (b)?

... on at this constant velocity of 25 ms⁻¹ for 10 sec, Then, it decelerates at -25/(25-15) = -2.5 ms⁻², until it stops after another 10 sec. ...

2. ### F4phy---

...should first find the distance traveled by the lift when it accelerate and decelerate , by s = ut+0.5at^2 whwn the lift accelerate, the distance it travel...

3. ### Physics problem

...when accelerated to a certain speed, moves at a uniform speed before it decelerates when reaching the next station. Since the man stands without...

4. ### Why the weight change on lift急

...ma =>R-mg= m(a') =>R=mg+ma' > mg Case 3 : decelerating F=ma =>R-mg=m(-a') =>R=mg-ma'<mg...

5. ### A question

...distance First find the thinking distance by s = vt. As the car decelerates at a uniform rate, we can apply the equations of motions to calculate...

6. ### [急]physics question(mechanics)

... cycling uniformly, d = 9 X 6 = 54 m So, the distance to decelerate , s = 108 - 54 = 54 m By s = (u + v)t / 2 54 = (9 + 0)t / 2 Time...

7. ### F.4 physic

1) false when the object is decelerating , the velocity will be positive but the acceleration will be negative, in this situation, the direction...

8. ### physics motion mc

... the car first accelerates uniformly from rest at a, and then decelerates uniformly at -a. By symmetry, the time taken during the acceleration stage and...

9. ### F4PHYSICS急!!!!!!!!!!!!!!!!!!!!

... oppsite tothe direction of motion of the car. By -f=ma,a=-f/m,thus the car decelerates . Also as the car is decelerating ,the car get hot as the work...

10. ### Physics Question

a , I would choose the initial direction as positive direction while the decelerating direction as the negative direction b, <---- Acceleration 2...