Question 1) A flea jumps by exerting a force of 1.22 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 1.12 10-6 N on the flea. Find the direction and magnitude of the acceleration of the flea if its mass is 6.0 10-7 kg. (Let us assume that Fwind points to the right. We will consider this to be the +x direction and vertical to be the +y direction.)
Question 2) Suppose two children push horizontally, but in exactly opposite directions, on a wagon containing a third child. The first child exerts a force of F1 = 75.0 N, the second a force of F2 = 91.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 22.0 kg. What would the acceleration be if friction is 16.0 N?
Question 3) The 1800 kg tractor exerts a force of 1.90 104 N backward on the pavement, and the system experiences forces resisting motion that total 2400 N. If the acceleration is 0.150 m/s2, what is the mass of the airplane?
Q1
flea exerting a force down on the ground equal reaction force will be upward F = 1.22*10^-5 N
breeze parallel to the ground along + x direction is F2 = 1.12*10^-6 N
mass of flea is m = 6.0*10^-7 kg
writing the forces of
F1 = 0 N i +1.22*10^-5 N j
F2 = 1.12*10^-6 N i + 0 N j
net force is F = F1+F2 = (0 N i +1.22*10^-5 N j )+( 1.12*10^-6 N i + 0 N j)
F = 1.12*10^-6 N i + 1.22*10^-5 N j
the magnitude is F = sqrt((1.12*10^-6)^2+(1.22*10^-5)^2) N = 1.225130*10^-5 N
the direction is theta = arc tan ((1.22*10^-5)/(1.12*10^-6)) degrees = 84.75 degrees
the magnitude of the acceleration is a = F/m = (1.225130*10^-5)/(6*10^-7) m/s2 = 20.42 m/s2
Q2
F1 = 75 N , F2 = 91 N
the friction is f = 12 N
mass of third child and wagon is m = 22 kg
net force is (F1+f)-(F2+f) = m*a
(75+12)-(91-12)= 22*a
a = 0.3636 m/s2
if the friction force is 16 N thne
F1+f)-(F2+f) = m*a
(75+16)-(91-16)= 22*a
a = 0.7272 m/s2
Q3
net force is 19000 N - 2400 N = 16600 N
the acceleration is m = F/0.15 = 16600/0.15 = 110666.67 kg
so the mass of the plane is m = 110666.67 kg
Question 1) A flea jumps by exerting a force of 1.22 10-5 N straight down on...
A flea jumps by exerting a force of 1.12 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 1.12 10-6 N on the flea. Find the direction and magnitude (in m/s2) of the acceleration of the flea if its mass is 6.0 10-7 kg. (Let us assume that Fwind points to the right. We will consider this to be the +x direction and vertical to be the +y...
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1. -/12 points OSColPhys1 4.3.009. My Notes Ask Your Teacher Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 29.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (Select...
-t points osUniphyst 5.2 P022 My Nese Two forces ofh- Two forces of Fi--N and F2- o-nr. and?2-110.00-JNact on an obje t. Fi d the third forcei, j) N act on an object. Find the third force F3 (in N) that is needed to balance the first two forces. (Express your answer in vector form) nN) that eeded to balance the "rst two forces (Express your answer nvector forn. Additional Materials eBook Suomit Answsr Save Piogress Practice Another Version My...
10: A powerful motorcycle can produce an acceleration of while traveling at 90.0 km/h. At that speed the forces resisting motion, including friction and air resistance, total 400 N. (Air resistance is analogous to air friction. It always opposes the motion of an object.) What is the magnitude of the force the motorcycle exerts backward on the ground to produce its acceleration if the mass of the motorcycle with rider is 245 kg? The powerful motorcycle, a chopper, in Problem...
10: A powerful motorcycle can produce an acceleration of while traveling at 90.0 km/h. At that speed the forces resisting motion, including friction and air resistance, total 400 N. (Air resistance is analogous to air friction. It always opposes the motion of an object.) What is the magnitude of the force the motorcycle exerts backward on the ground to produce its acceleration if the mass of the motorcycle with rider is 245 kg? The powerful motorcycle, a chopper, in Problem...