ملتقى الفيزيائيين العرب - بليز الحل ضروري اليوم قبل بكره عندنا تسليم الاوراق وانا ما عرف احل هذه الاسئلة الفيز

بليز الحل ضروري اليوم قبل بكره عندنا تسليم الاوراق وانا ما عرف احل هذه الاسئلة الفيزيائية
الرجاء مساعدتي

- Show how to convert Newton into dyne or prove that 1N=10^5 dyne.
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2- Show that 1J=10^7 erg.
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3- Find the relation between each of the following
a) Joule and Newton b) Newton and Pascal
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4- Write down the dimensional equation for each of the following quantities and find
their units: Power - momentum – pressure.
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5- Check the following mathematical relations
a) E= mv^2 + F/V [E: energy ،٬ m:mass ،٬ v:speed ،٬ F:force ،٬ V: volume]
b) P=r g h [r density ،٬ g acceleration h height]
c) X = vt + ½ at^2 [X: distance ،٬ v: speed t: time a : acceleration].
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A truck on a straight road starts from rest, accelerating at
2.00 m/s2 until it reaches a speed of 20.0 m/s. Then the
truck travels for 20.0 s at constant speed until the brakes are
applied, stopping the truck in a uniform manner in an additional
5.00 s. (a) How long is the truck in motion? (b) What
is the average velocity of the truck for the motion described؟

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An automobile travels on a straight road for 40 km at 30 km/h. It then continues in the
same direction for another 40 km at 60 km/h. (a) what is the average velocity of the car
during this 80 km trip? (Assume that it moves in the positive x direction.) (b) What is the
average speed?
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The position of an object moving along an x axis is given
by x = 3t - 4t^2 * t^3,where r is in meters and / in seconds. Find
the position of the object at the following values of r: (a) 1 s,
(b) 2 s, (.) 3 s, and (d) 4 s. (") What is the object's
displacement betweerr t = 0 and t = 4 s? (f) What is its average
velocity for the time interval from t= 2s to t=4s?

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A hot-air balloon is ascending at the rate of 12 m/s and
is 80 m above the ground when a package is dropped over the
side. (a) How long does the package take to reach the ground?
(b) With what speed does it hit the ground

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a baseball is hit so that it travels straight upward after being struck by the bat . a fan observes that it takes 3.00 S for the ball to reach it's maximum height . find ( a) it's initial velocity and ( b) the height it reaches

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