Unit 1 Exam Review

Given the net forces on and the masses of the blocks shown above, which two blocks have the same acceleration? Select two answers.

A box is pulled along a surface of negligible friction by a spring scale that exerts a force F on the block. The mass of the block is 2kg , and the spring scale reads 15N. Which of the following free-body diagrams can be used to show the magnitude and direction of all the forces exerted on the block as it is pulled along the surface?

Which of the following is true about the speed of the object during the time interval from 4s to 8 s?

Which of the following is true about the speed of the object during the time interval from zero to 4 s?

Which of the following is true about the acceleration of the object during the time interval from 4 to 8 s?

What is the net displacement of the object for the time interval from 4 to 8 s?

What is the net displacement of the object for the time interval from 0 to 4 s?

What is the net displacement of the object for the time interval from 0 to 8 s?

1.       An object is dropped from rest and falls freely 30 m to Earth. When is the speed of the object 10 m/s?