--A 5.0 kg block has an acceleration of 0.20 m/s^2 when a force is exerted on it. A second block as an acceleration of 0.10 m/s^2 when subject to the same force. What is the mass of the second block?

---A person pulling an empty wagon causes it to accelerate at 1.4 m/s^2. What will the acceleration be if he pulls with the same force when the wagon contains a child whose mass is three times that of the wagon? [Assume friction between the wagon and the ground is small, and doesn't change much when the child gets in the wagon.]

---True or False? "In order to lift a bucket of concrete, you must exert more force on the bucket than the bucket exerts on you."

---You are in a train traveling on a horizontal track and notice that a piece of luggage on the floor starts to accelerate directly toward the front of the train. From this observation, you can conclude that this train is

a) speeding up.

b) slowing down.

c) changing direction.

d) speeding up and changing direction.

e) slowing down and changing direction.

--- A person is using a rope to lower a 0.51-kg bucket into a well with a constant speed of 2.0 m/s. What is the magnitude of the force exerted by the rope on the bucket?

---- When you jump on a trampoline, the Earth exerts a gravitational force on you,

causing you to accelerate with an acceleration of magnitude ay. According to Newton's Third Law, you exert a gravitational force on the Earth, causing the Earth to accelerate with an acceleration of magnitude (15. What, approximately, is the ratio of the Earth's acceleration to yours % ? [Assume you have a mass of 60 kg, and the Earth has a mass of 6 x 1024 kg.] Y