Gunter the weightlifter can lift a 230.0-kg barbell overhead on earth. the acceleration due to gravity on the sun is 274 m/s2. a) would the barbells be heavier on the sun or on earth? b) how much (in newtons) would the barbells weigh on the sun (if it were possible to stand on the sun without melting)?

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.