I want someone who will help me with physical science homeworks

A Funct is standing on a statuemary 23 by skateboard. If the leamer jumps at a really of 1 37 mustforwand, the skateboard's velocity becomes A,$ ma back ward Calculate the mass of the learner? A llO kg astronaut and a 1 010 ky spacecraft are attached by a tethering cable. Both masses are motionless relative to an observer near the spacecraft. The Jsimonand wants to return to the spacecraft, so he pulls on the cable until his velocity is 0,8 m.s' toward the spacecraft. a) Calculate the change in velocity of the spacecraft? bj Explain how pulling on the tethering cable in one direction causes the astronaut to move in the opposite direction. A T ke hunter is in a 10 kg stationary canoe, on the water. He throws 3 0.72 ka when 41 in the right