For technology project a student has built a vehicle of

Last updated: 6/9/2023

For technology project a student has built a vehicle of total mass 5 kg that moves itself As shown in the figure it runs on four light wheels A reel is attached to one of the axles and a cord originally wound on the reel goes up over the pulley attached to the vehicle to support an elevated load After the vehicle is released from rest the load descends very slowly unwinding the cord to turn the axle and make the vehicle move forward Friction is negligible in pulley and axle bearings The wheels do not slip on the floor The reel has been constructed with a conical shape so that load descends at a constant low speed while the vehicle moves horizontally across the floor with a constant acceleration reaching a final velocity of 3 m s Mark the CORRECT option s A Magnitude of impulse on the vehicle due to friction of floor is 15 N s B Work done by friction force between tyre and floor is 27 J C Change in gravitational potential energy of earth and cart system is 27 J D The acceleration of the cart is due to friction force from the ground