Chris wants to make two objects have the same change in velocity. Object A has a mass of 200g and Object B has a mass of 300g. Which object will Chris have to exert a greater force into? Answer choices(pick one)

1.Object A because it takes more force to move a less massive object.

2.Object A because it will have more speed since it has less mass.

3.Object B because it requires more force to move a more massive object.

4.Object B because it has more mass so it will always move much faster.

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.