Which graph(s) show an object that is slowing down?
Answer
A
B
C
D
Question 5
Question
Which of the following equations describe the position of an object moving with constant acceleration starting from rest as a function of time. (Choose all that apply)
Each of the following choices show a sequence of dots that represent successive positions of an object moving to the right measured at 1 second intervals. Which sequence represents motion with constant non-zero acceleration? (There may be more than one correct answer.)
A block with a propeller unit attached can move along a track. The fan thrust exerts a constant force on the block to the right.
Which of the free body diagrams below represents the forces exerted on a block that is moving on a frictionless track?
The block and fan in the previous question has a mass of 750 grams. What would be the magnitude of the downward gravitational force in Newtons exerted on the block near Earth’s surface? (Answer in Newtons with two significant digits.) Enter your result in the space below.
[blank_start]Space[blank_end]
Answer
7.4 N
Question 10
Question
The fan thrust on the block is measured to be 1.2 N, and the acceleration of the block is measured to be 1.4 m/s/s. Determine the frictional force in Newtons that must be exerted on the block. Enter your result in the box below.
[blank_start]0.15[blank_end] N