A mass of 2.5 kg lies on a frictionless table, pulled by another mass of 4.1 kg under the
influence of Earth's gravity.
The acceleration of gravity is 9.8 m/s2.
What is the magnitude of the acceleration
a of the two masses?
Answer in units of m/s2.

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Which substance partical has negligible massand travels around outsidethe nucleus