搜搜做题作业网SAT PHYSICS HHHHHHHHHHHHHHHELP
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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?
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?
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~
Princeton 63页第六题此题出没~