Answer:
1. A 1 kg object accelerated at a constant 5 m/s2. Estimate the net force needed to accelerate the object.
Known :
Mass (m) = 1 kg
Acceleration (a) = 5 m/s2
Wanted : net force (∑F)
Solution :
We use Newton’s second law to get the net force.
∑F = m a
∑F = (1 kg)(5 m/s2) = 5 kg m/s2 = 5 Newton
Read : Physical quantities, units, dimensions – problems and solutions
2. Mass of an object = 1 kg, net force ∑F = 2 Newton. Determine the magnitude and direction of the object’s acceleration….
Newton's second law of motion – problems and solutions 1
Known :
Mass (m) = 1 kg
Net force (∑F) = 2 Newton
Wanted : The magnitude and direction of the acceleration (a)
Solution :
a = ∑F / m
a = 2 / 1
a = 2 m/s2
The direction of the acceleration = the direction of the net force (∑F)
