Write your answer in the answer sheet for the following questions. 12) A 10 kg block slides down a ramp that makes 39o angle with the horizontal. If the coefficient of kinetic friction is 0.3, find the acceleration of the block. 13) As a block of mass 7 kilograms drops from the edge of a 40-meter-high cliff it experiences a loss of energy due to air resistance of 280 J. At what speed will the rock hit the ground? (give your answer to 1 decimal place) 14) A ball of mass 80 kg is dropped from 48 meters above the floor. Find the speed of the ball as it strikes the floor. 15) A 3860 kg truck moving at 5 m/s westward collides with a 1300 kg car moving at 20 m/s eastward. The two vehicles collide and then move together. Find the common speed and then calculate the final KE. What is the final KE? 16) While spinning down from 95 rads/s to rest, a solid cylinder does 3.7 kJ of work. If the radius of the disk is 1.2 m, what is the mass? 17) A ramp of height 1 m is shown in figure A6, above. A solid sphere rolls down the ramp. Find the final velocity of the sphere at the bottom of the ramp. 18) If the mass of the plank is 8.8 kg what mass (M) is needed to balance the seesaw? 19) A torque of 12 Nm is applied to a solid, uniform disk of radius 1.55 m. If the disk accelerates at 6.6 rad/s2, what is the mass of the disk?
Write your answer in the answer sheet for the following questions.
12)
A 10 kg block slides down a ramp that makes 39o angle with the horizontal. If
the coefficient of kinetic friction is 0.3, find the acceleration of the block.
13)
As a block of mass 7 kilograms drops from the edge of a 40-meter-high cliff it
experiences a loss of energy due to air resistance of 280 J.
At what speed will the rock hit the ground?
(give your answer to 1 decimal place)
14)
A ball of mass 80 kg is dropped from 48 meters above the floor. Find the speed
of the ball as it strikes the floor.
15)
A 3860 kg truck moving at 5 m/s westward collides with a 1300 kg car moving
at 20 m/s eastward. The two vehicles collide and then move together.
Find the common speed and then calculate the final KE.
What is the final KE?
16)
While spinning down from 95 rads/s to rest, a solid cylinder does 3.7 kJ of
work.
If the radius of the disk is 1.2 m, what is the mass?
17)
A ramp of height 1 m is shown in figure A6, above.
A solid sphere rolls down the ramp.
Find the final velocity of the sphere at the bottom of the ramp.
18)
If the mass of the plank is 8.8 kg what mass (M) is needed to balance the seesaw?
19)
A torque of 12 Nm is applied to a solid, uniform disk of radius 1.55 m. If the
disk accelerates at 6.6 rad/s2, what is the mass of the disk?
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