GATE 2021: Engineering Mechanics Quiz 1 (App update required to attempt this test)

A vegetable vendor weighing the vegetables using a weighing pan, the weight of the vegetables is lesser than the weights in the pan. The vendor holds the weighing scale with its hand thus applying some force. The forces thus analyzed forms a :

Two identical trusses support a load of 100 N as shown in the figure. The length of each truss is 1.0 in: cross-sectional area is 200 〖mm〗^2; Young's modulus E = 200 GPa. The force in the truss AB (in N) is _________.

A bullet of mass 100 g is fired from below into the bob of mass 900 g of a long simple pendulum as shown in fig. The bullet remain inside the bob and bob rises through a height of 1.8 m. The speed of bullet (in m/s) is (Assume acceleration due to gravity =10 m/s²)

A boy drops a ball from a height of 9 m on a concrete ground. The ball then bounces from the ground vertically upwards. The coefficient of restitution is 0.8 What will be the velocity of the ball when it reach’s a height of 2m. ________