King Fahd University of Petroleum & Minerals
Department of Physics

Physics 101
Quiz # 2

Name: __________________________________________  Id # _______________ Sec. ____________
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Q.:	A ball is thrown vertically upward from the top of a 40 m high building. The ball strikes the ground 10 seconds later. Find

a)	The initial speed of the ball.

	b)	The time it takes to reach the highest point.

King Fahd University of Petroleum & Minerals
Department of Physics

Physics 101
Quiz # 2

Name: __________________________________________  Id # _______________ Sec. ____________
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Q :	A ball is thrown vertically downward with a speed of 10 m/s from the top of a building of height H. The ball strikes the ground 4 seconds later. Find

b)	The height H of the building.

	b)	Its velocity when it hits the ground.

King Fahd University of Petroleum & Minerals
Department of Physics

Physics 101
Quiz # 2

Name: __________________________________________  Id # _______________ Sec. ____________
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Q :	Vector A has a magnitude of 4 m and is oriented 30 degree East of North while vector 
            B = -2 i + 2 j.

c)	Find the angle between these two vectors.

	b)	Find the cross product of these two vectors.

King Fahd University of Petroleum & Minerals
Department of Physics

Physics 101
Quiz # 2

Name: __________________________________________  Id # _______________ Sec. ____________
------------------------------------------------------------------------------------------------------------------------------
Q.:	A ball is thrown vertically upward from the ground with initial speed V0. One second later its velocity is observed to be +15.2 m/s.

d)	Find the initial speed of the ball V0  .

	b)	Find the  time when the ball is moving dawnward with a speed of 4.4 m/s.