1. Calculate and give the direction of the net force in the following situations
ID: 1658718 • Letter: 1
Question
1. Calculate and give the direction of the net force in the following situations: An 850 N skydiver experiencing 200 N of air resistance. a. b. Applying 2500 N of force northward to a refrigerator that offers 2000 N of resistance. 2. Draw the net force vector (arrow) and label the amount of the net force for the following: 1700 N 65 N 15 N 151 N 1700 N 500 N 90 N 85 N 3. What is the acceleration of a 4000 kg airplane that has a force on it of 24,000 N? 4. An 80 N force will accelerate a 20 kg mass at 4.0 m/s' a. What force will be required to maintain the same acceleration if the mass is doubled? b. If the mass is doubled and the force remains the same, what is the acceleration? is applied to both, which will stop first? Why? 6. Why does it take more force to push a car at rest than to keep a car moving?Explanation / Answer
The image is posted up side down, I will still answer 4 parts:
Q.3 F = ma
24,000 = 4000 (a)
a= 6 m/s^2
Q.4: a) F = ma
F = 40 (4) = 160 N
b)80 = 40 (a)
a= 2 m/s^3
Q.5 )F = ma =m ( v-u) /time
m1 ( 0 - 30 km/hr)/ t1 = m2 ( 0-30 km/hr) / t2
m1/t1= m2/t2
the above relationship that mass and time are directly proportional, if the mass goes up, so the time required to stop it. Out of two, the one with lighter mass will stop first
Q.6 once a bus is moving or is at rest, it experiences friction: Static and kinetic
Static friction is always greater than kinetic friction.
When a bus starts from rest , it's static friction exists between bus and path, while for a moving bus it's kinetic friction which exists between bus and road.
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