Javier made a list about balanced and unbalanced forces. Balanced Forces
Unbalanced Forces
• can cause an object to speed • cause objects to stay in the
up, slow down, or change
same place or to continue
directions
moving at the same speed
Javier made a mistake on his list. Which best describes the mistake Javier made?
A
Javier forgot to add that forces can never change.
B
Balanced forces only cause objects to change directions.
С
Unbalanced forces only cause objects to stay in the same place.
D
Javier switched the descriptions for unbalanced and balanced forces

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

What is the angular momentum of the bar about the axle?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?