Final answer:
A constant force of 82 N can accelerate an object, move it at constant speed, change its direction, or balance another force. An object on an icy surface with zero friction continues at a constant speed when the applied force stops. The force on a wagon with known mass and acceleration is found using the formula F = ma.
Step-by-step explanation:
A constant force can perform various actions on an object depending on the circumstances. When a constant force of magnitude 82 N is applied to an object, it can (a) accelerate the object if there's no other force counteracting it, (b) move the object at a constant speed if it balances other forces such as friction or air resistance, (c) change the object's direction if it is applied in a different direction than the object's motion, and (d) balance another force if they are equal in magnitude but opposite in direction, resulting in no net force on the object.
Considering an object on a smooth icy surface, when a force that was accelerating it stops and assuming there is zero friction, the object's acceleration becomes zero, but the object continues moving at the same speed it had when the force stopped, according to Newton's first law of inertia.
In another scenario, when a parachutist opens their parachute, they experience a decrease in acceleration due to the increased air resistance. However, without detailed information about initial conditions and time, we cannot determine the exact speed at which the parachutist is falling.
Calculating the force on a wagon given its mass and acceleration involves using Newton's second law of motion, F = ma. For a wagon with mass 55 kg accelerating at a rate of 0.0255 m/s², the force is calculated as F = (55 kg)(0.0255 m/s²), which equals 1.4025 N.
For forces acting on cars moving at constant speed versus cars accelerating, the net horizontal force is different. If a car is moving at constant speed, the net horizontal force is zero, meaning all forces are balanced. If the car is accelerating, there is a net force in the direction of acceleration.