The bob of a simple pendulum is 0.50 m above the floor at its lowest position. Calculate the maximum speed of the bob when it is held at a maximum height of 2.5 m and released
6.3 m/s
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A supertanker filled with oil has a total mass of 6.1 × 10^8 kg. If the dimensions of the ship are those of a rectangular box 300 meters long, 80 meters wide, and 40 meters high, determine how far the bottom of the ship is below sea level. (?sea = 1 020 kg/m3.)
a. 10 m b. 15 m c. 20 m d. 25 m e. 30 m
Which requires more work on the brakes of a car?
A) slowing down from 100 km/h to 70 km/h B) slowing down from 70 km/h to a stop C) equal amounts of work for either
If you take two steps of different sizes, (a) can you end up at your starting point? More generally, (b) can two vectors with different magnitudes ever add to zero? (c) Can three or more?
A. (a) Yes, (b) No, (c) Yes B. (a) No, (b) No, (c) Yes C. (a) No, (b) Yes, (c) Yes
A wheel rotating about a fixed axis with a constant angular acceleration of 2.0 rad/s2 turns through 2.4 revolutions during a 2.0-s time interval. What is the angular velocity at the end of this time interval?
a. 9.5 rad/s b. 9.7 rad/s c. 9.3 rad/s d. 9.1 rad/s e. 8.8 rad/s