(Solved): Question 2 (2 points) A sled of mass 8.0 kg moving across the snow on a horizontal surface has an i ...

Question 2 (2 points) A sled of mass 8.0 kg moving across the snow on a horizontal surface has an initial speed of 4.0 m/s. A force is applied to the sled to increase its speed to 9.0 m/s. How much work was done on the sled? 260 J 390 J 460 J 320 J 520 J Question 5 (3 points) A wagon is moving at a speed of 1.0 m/s while a toy car is moving at a speed of 4.0 m/s. Both objects have the same kinetic energy. What is the ratio of the toy car's mass to the wagon's mass? O2:1 1:4 01:16 4:1 1:8 Question 7 (3 points) Object A has speed v and mass m. Object B has speed 2v and mass 3m. The ratio of the kinetic energy of object B to object A is given be 04:1 06:1 3:1 12:1 08:1