A5kg object is released from rest near the surface of a planet such that its gravitational field is considered to be constant. the mass of the planet is unknown. after 2s, the object has fallen 30m. air resistance is considered to be negligible. what is the gravitational force exerted on the 5kg object near the planet’s surface?

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.

Mechanical energy is when there are no forces causing an object to lose energy. a. increased b. conserved c. decreased d. doubled i need this answer ! .