1.) Due to a jaw injury, a patient must wear a strap (see the figure) that produ
ID: 1327640 • Letter: 1
Question
1.) Due to a jaw injury, a patient must wear a strap (see the figure) that produces a net upward force of 7.90 N on his chin. The tension is the same throughout the strap. To what tension must the strap be adjusted to provide the necessary upward force?
2.) In outer space, a constant force is applied ta a 33.9kg probe initially at rest. The probe moves a distance of 100 m in 15 s. What acceleration does this force produce? What is the magnitude of the force?
3.) An ordinary flea has a mass of 205 g . How many newtons does it weigh?
Explanation / Answer
2)
mass of probe , m = 33.9 kg
distance , d = 100 m
t = 15 s
initial speed , u = 0 m/s
Using second equation of motion
d = u * t + 0.5 at^2
100 = 0.5 * a * 15^2
a = 0.89 m/s^2
accleration produced by this force is 0.89 m/s^2
using second law of motion
F = m* a
F = 33.9 * 0.89
F = 30.13 N
the magnitude of force applied on probe is 30.13 N
3)
mass , m = 205 ug
weight , W = 205 *10^-9 * 9.8
W = 2.01 *10^-6 N
the weight of 2.01 *10^-6 N
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.