![]() The mass of the losing player plus equipment is 90.0 kg, and he is accelerating backward at 1.20m/s 2. *A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800.0 N on him.(c) What would the acceleration be if friction were 15.0 N? (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? The first child exerts a force of 75.0 N, the second exerts a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. *Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon.Propose a method by which recoil of the vehicle is avoided. (c) Discuss how this would affect the measurement of the astronaut’s acceleration. Use this knowledge to find an equation for the acceleration of the system (astronaut and spaceship) that would be measured by a nearby observer. (b) By exerting a force on the astronaut, the vehicle in which she orbits experiences an equal and opposite force. Suppose a net external force of 50.0 N is exerted, and an astronaut’s acceleration is measured to be 0.893m/s 2. One way to do this is to exert a known force on an astronaut and measure the acceleration produced. This means that a clever method of measuring the mass of astronauts is needed to monitor their mass gains or losses, and adjust their diet. *Astronauts in orbit are apparently weightless. ![]()
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