During the May Day holiday, Jun Jun's family went to Zhenyuan for a trip. As shown in the picture, this is their new solar electric sightseeing bus. The total mass of the vehicle is 400 kg. (g take it

During the May Day holiday, Jun Jun's family went to Zhenyuan for a trip. As shown in the picture, this is their new solar electric sightseeing bus. The total mass of the vehicle is 400 kg. (g take it. (1) sightseeing bus is at rest on the horizontal ground, and its pressure on the ground is equal to gravity.

F=G total =(m vehicles +m people) g = (400kg+220kg) ×10n/kg = 6200n,

Sightseeing bus's pressure on horizontal ground: p = fs = 6200n0.05m2 =1.24x105pa;

(2) Five-minute driving distance in sightseeing bus: s=vt=5m/s×5×60s= 1500m.

Work done by sightseeing bus in overcoming resistance: w = fs = 200 n×1500m = 3×105j.

Answer: (1) When sightseeing bus is at rest, the pressure on the horizontal plane is1.24×105 Pa;

(2) The work done by sightseeing bus to overcome the resistance in 2)5min is 3× 105J. ..