3. A trench mortar fires a shell at an angle of 30' with the horizontal and with a speed of 400 m/s. Find its range and maximum
height it attains.

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The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.