1) A 300 -g mass is hung from acoiled spring and it stretches 20 cm.it is then streched an additional 15cm and released. Find (a) the freuency of vibration (b) the period,and (c) the velocity and acceleration at a displacement of 20 cm.

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1) A 300 -g mass is hung from acoiled spring and it stretches 20 cm.it is then streched an
additional 15cm and released. Find (a) the freuency of vibration (b) the period,and (c) the
velocity and acceleration at a displacement of 20 cm.
a 1550-kg car moving at a constant speed of (900 km/hr) Its takes (16,000W)to keep it on
alevel road.How much power is required to keep the car moving at the same speed up a hill
2)
inclined at an angle of 35° with horizontal?
3) A 50-g block as in figure below is connected to a spring on a rough inclined plane that
makes an angle of 30 °with the horizontal.the block is pulled down the plane a distance
A =10 cm ,and is then released .the spring constant is 40 N/m and the coeffiecient of kinetic
friction is 0.25.Find the speed of the block when the displacement x= -A/2
A
Transcribed Image Text:1) A 300 -g mass is hung from acoiled spring and it stretches 20 cm.it is then streched an additional 15cm and released. Find (a) the freuency of vibration (b) the period,and (c) the velocity and acceleration at a displacement of 20 cm. a 1550-kg car moving at a constant speed of (900 km/hr) Its takes (16,000W)to keep it on alevel road.How much power is required to keep the car moving at the same speed up a hill 2) inclined at an angle of 35° with horizontal? 3) A 50-g block as in figure below is connected to a spring on a rough inclined plane that makes an angle of 30 °with the horizontal.the block is pulled down the plane a distance A =10 cm ,and is then released .the spring constant is 40 N/m and the coeffiecient of kinetic friction is 0.25.Find the speed of the block when the displacement x= -A/2 A
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