Asled is moving down a steep hill. the mass of the sled is 50 kg and the net force acting on it is 20 n. what must be done to find the acceleration of the sled? which ones apply to this scenario.

1. the force of gravity must be broken into its parallel and perpendicular components.

2. acceleration can be found by dividing the net force by mass.

3. acceleration can be found by multiplying the net force by mass.

4. the magnitude of the force components must be multiplied by gravity.

5. trigonometry can be used to solve for the magnitude of the force components.

6. net force must be found before acceleration can be found.

An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of 10000 n. how far does the car travel before stopping?

1. consider the case in which air fills air shocks on a truck trailer. the pressure in the shocks is 2 mpa. the temperature is 300 k. the diameter of the shock piston is 10 cm and the initial length of the cylindrical cavity containing the compressed air is 40 cm. a. the truck is gradually loaded over a period of a day in a static setting. the temperature is held constant for the atmosphere and thus for the gas shock. calculate the compressibility of the air in the shock for this condition when the truck is initially being loaded. b. if the shocks were loaded in a dynamic setting by driving over bumps, what would be the compressibility? state your assumption. c. what is the initial load on the shock if the shock is in an atmospheric 100 kpa? d. if the shock is compressed using the process described in part a, and the air shock compressed air cavity length decreases to 20 cm, what is the additional load applied to the shock?

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