أسئلة فيز .. #ساعدوني

a/ A pile driver drops from a height of 35m before landing on a piling . What is the speed of the driver when its hits the piling?

b/ A brick falls off the roof of a building . If it falls with the acceleration due to gravity of 9.8m/s2:
- What will be its velocity after 1s?
- What will be its average velocity during the 1s?
- What will be the distance fallen after 1s?
- What will be its velocity after 2s?
- What will be its average velocity during the 2s?
- How far will be brick fall in this second?
- What will be the total distance fallen after 2s?

c/ What mass must be attached to a vertical spring with a spring constant of N/m in order to cause it to stretch by 95 cm?

d/ A net force of 5000 N accelerates a car from 40km/h in 5s:
- What is the mass of the car?
- What is the weight of the car?

e/ A car increases its speed from 1m/s to 4m/s . What will be the speed at 6s if the acceleration stays the same?

f/ A far in the future, an astronaut visits the moon of a distance planet. On this moon, she weights 100N. If she leaves the moon to visit the planet, which is 8 times the mass and twice the gravity of the moon, what would she weight?

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