SAT PHYSICS HHHHHHHHHHHHHHHELPA projectile is launched at a velocity of 125meters per second at an angle of 20degree.A building is 200 meters away.At what height above the ground will the projectile strike the building?

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SAT PHYSICS HHHHHHHHHHHHHHHELPA projectile is launched at a velocity of 125meters per second at an angle of 20degree.A building is 200 meters away.At what height above the ground will the projectile strike the building?

SAT PHYSICS HHHHHHHHHHHHHHHELPA projectile is launched at a velocity of 125meters per second at an angle of 20degree.A building is 200 meters away.At what height above the ground will the projectile strike the building?
SAT PHYSICS HHHHHHHHHHHHHHHELP
A projectile is launched at a velocity of 125meters per second at an angle of 20degree.A building is 200 meters away.At what height above the ground will the projectile strike the building?

SAT PHYSICS HHHHHHHHHHHHHHHELPA projectile is launched at a velocity of 125meters per second at an angle of 20degree.A building is 200 meters away.At what height above the ground will the projectile strike the building?
125m/s乘以cos20,这是水平方向的速度.再用200除以刚才所得的数值.可以得出所需时间.125sin20t-1/2gt方=s 求出s即可.
Princeton 63页第六题此题出没~