Your car is accelerating to the right from a stop. Part A Identify all forces ac
ID: 2026875 • Letter: Y
Question
Your car is accelerating to the right from a stop.Part A
Identify all forces acting on the object and draw the free-body diagram.
Draw the force vectors with their tails at the dot. The orientation of your vectors will be graded. The exact length of your vectors will not be graded but the relative length of one to the other will be graded
B.)
A person on a bridge throws a rock straight down toward the water. The rock has just been released.
Draw a free-body diagram.
Draw the force vectors with their tails at the dot. The orientation of your vectors will be graded. The exact length of your vectors will not be graded but the relative length of one to the other will be graded.
Explanation / Answer
(A) The only forces that are exerted on your car as it accelerates are thos that act along the x, y, and z directions, as follows: 1) Centripetal Force (from accelerating along an arc in the xy plane (the road plane) - acceleration is generated by the engine power, they are not 2 different forces, i.e., the engine causes the centripetal force...this can be extended deeper to say that the heat energy generated by combustion imparts an energy transfer to the pistons, which move and create the engine's horsepower force, which cause the acceleration, which causes the centripetal force of the car's center of mass) 2) Gravitational Force (the weight of the car, along the z-axis, equal and opposite to the Normal Force of the road on the tires via the weight of the car, mg) 3) Frictional Forces (from air drag in the xy-plane, z-axis drag contributes to the gravitational force but may be negligible in real-world situations, plus the x and y-axes' kinetic frictional forces between tires and road)
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