a) Find the acceleration of the block if the incline is frictionless.
b)Find the acceleration of the block if the coefficient of kinetic friction between the block and incline is 0.12.
A block of mass m = 5.2 kg is pulled up a è = 24° incline as in the figure with a force of magnitude F = 34 N.
2 answers
a)
F=ma
F-mg sin 24= ma
a= 34-[ 5.2(9.81) sin 24]/5.2
a=2.55m/s^2
b)
F=ma
mg sin 24-Fk=ma
(5.2x 9.81x sin 24)- (5.2x 9.81x cos 24)(0.12)= 5.2a
20.75-5.59=5.2a
a=2.91m/s^2
F=ma
F-mg sin 24= ma
a= 34-[ 5.2(9.81) sin 24]/5.2
a=2.55m/s^2
b)
F=ma
mg sin 24-Fk=ma
(5.2x 9.81x sin 24)- (5.2x 9.81x cos 24)(0.12)= 5.2a
20.75-5.59=5.2a
a=2.91m/s^2
2 answers