1
GATE ME 2015 Set 2
+2
-0.6
The deflection of a spring with 20 active turns under a load of 1000 N is 10 mm. The spring is made into two pieces each of 10 active coils and placed in parallel under the same load. The deflection of the system is
A
20 mm
B
10 mm
C
5 mm
D
2.5 mm
2
GATE ME 2008
+2
-0.6
A compression spring is made of music wire of $$20$$ mm diameter having a shear strength and shear modulus of $$800$$ MPa and $$80$$ GPa respectively. The mean coil diameter is $$20$$ mm, free length is $$40$$ mm and the number of active coils is $$10.$$ If the mean coil diameter is reduced to $$10$$ mm, the stiffness of the spring is approximately
A
Decreases by $$8$$ times
B
Decreases by $$2$$ times
C
Increases by $$2$$ times
D
Increases by $$8$$ times
3
GATE ME 2005
+2
-0.6
A weighing machine consists of a 2 kg pan resting on a spring in this condition, with the pan resting on the spring, the length of the spring is 200 mm. When a mass of 20 kg is placed on the pan, the length of the spring becomes 100 mm. For the spring, the un-deformed length L and the spring constant K (stiffness) are
A
L $$=$$ 220 mm, K $$=$$ 1862 N/m
B
L $$=$$ 210 mm, K $$=$$ 1960 N/m
C
L $$=$$ 200 mm, K $$=$$ 19860 N/m
D
L $$=$$ 200 mm, K $$=$$ 2156 N/m
GATE ME Subjects
EXAM MAP
Medical
NEET