A helicopter of mass 1.40×103kg1.40×103kg is descending vertically at 3.00 m/sm/s. The pilot increases the upward thrust provided by the main rotor so that the vertical speed decreases to 0.450 m/sm/s as the helicopter descends 3.00 mm. What is the initial energy of the helicopter?

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is