An object is moving forward along the ground. in order to change the object's direction, a force needs to act on the object. this force could be

a. a push or pull forward. b. a push or pull downward. c. a push or pull to the right. d. all of these

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.