What happens to the force of gravity between two planets if their masses are both doubled and the distance between them remains the same? doubles

quadruples

stays the same

decreases to ¼ its original value

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.