If Shane and Susan both push on a box with a force of 25N, but in opposite directions, what will happen to the box?
Responses
A The box will slide toward Susan.The box will slide toward Susan.
B The box will not move.The box will not move.
C The box will be perpendicular to both Shane and Susan.The box will be perpendicular to both Shane and Susan.
D The box will slide toward Shane.The box will slide toward Shane.
D The box will slide toward Shane.
An equal force is used to push several blocks of different sizes across a table. The time it takes for the block to move across the table is recorded and a graph of the data is made. What can you conclude from the data?
Responses
A Larger boxes travel slower because they take less time to cross the table.Larger boxes travel slower because they take less time to cross the table.
B Larger boxes travel slower because they take longer to cross the table.Larger boxes travel slower because they take longer to cross the table.
C Smaller boxes travel slower because they take less time to cross the table.Smaller boxes travel slower because they take less time to cross the table.
D Larger boxes travel faster because they take longer to cross the table.
B Larger boxes travel slower because they take longer to cross the table.
12 of 1912 of 19 Items
03:41
Question
Mutt and Jeff are running along a path each pushing a cart loaded with rocks. If Mutt's wagon has a mass two times greater than Jeff's and they want to stay together, arriving at their destination at the same time, what must happen?
Responses
A Mutt and Jeff will use the same force, but Mutt will take bigger steps.Mutt and Jeff will use the same force, but Mutt will take bigger steps.
B Mutt must use twice as much force to push his cart.Mutt must use twice as much force to push his cart.
C Jeff should slow down so Mutt can catch up.Jeff should slow down so Mutt can catch up.
D Mutt must use half as much force to push his cart.
B Mutt must use twice as much force to push his cart.
13 of 1913 of 19 Items
04:00
Question
Newton's law of inertia describes how an object in motion will stay in motion unless acted upon by an outside force. The concept of inertia is responsible for injuries during collisions. Which of these apparatus is installed or used to directly reduce the impacts due to inertia? Select ALL that apply.
Responses
A speed bumps installed on the roadwaysspeed bumps installed on the roadways
B seat belts installed and used in carsseat belts installed and used in cars
C brake pads on vehiclesbrake pads on vehicles
D lap bars on amusement park rideslap bars on amusement park rides
E guard rails on the interstate along a curve
B seat belts installed and used in cars
D lap bars on amusement park rides
Which BEST describes the difference between speed and velocity?
Responses
A Velocity includes rate of change and direction.Velocity includes rate of change and direction.
B Speed is a vector quantity.Speed is a vector quantity.
C Velocity is instantaneous.Velocity is instantaneous.
D Speed includes rate of change and direction.
A Velocity includes rate of change and direction.
Which example best demonstrates how unbalanced forces change the speed of an object's motion?
Responses
A A child walking around the corner of a school hallway.A child walking around the corner of a school hallway.
B A child sitting in a chair reading a book.A child sitting in a chair reading a book.
C A child on a bicycle braking at a stop sign.A child on a bicycle braking at a stop sign.
D A child singing a song.