4. Cleo the black lab runs to pick up a stick on the ground at location x = 3.0 m. The equation for motion of Cleo is x = -12.1 m +(5.2 m/s) *t. a) Where is Cleo at t = 1.6 s?

b) At what time does Cleo reach the stick?

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .