Force Equations

• −200 J

• 173 J

• - 173 J

• 200 J

Answer explanation

We know this work is positive because the direction of motion is in the same direction as the force (angle less than 90)

Tags

NGSS.HS-PS2-1

______________ is a force acting over some amount of time to cause a change in momentum

• Work

• Impulse

• Energy

• Power

Tags

NGSS.HS-PS2-3

A box moves 5 m horizontally when a force, F = 10 N is applied at an angle (120 degrees) as shown. What is the work done on the box by F during the displacement

• -44 J

• 25 J

• -25 J

• 44 J

Answer explanation

We know the work is negative because the force is against the direction of motion.

Tags

NGSS.MS-PS3-5

A box moves 10 m horizontally as a force F = 20 N is applied downward. What is the work done on the box by F during the displacement?

• 0 J

• 200 J

• -200 J

• 20 J

Answer explanation

perpendicular forces do no work on the object.

Tags

NGSS.MS-PS2-2

What is the force required to accelerate a 10 kg object at 5 m/s²?

• 2 N

• 5 N

• 50 N

• 100 N

Tags

NGSS.MS-PS2-2

Thomas is conducting an experiment in his physics class to measure the force required to move a 5kg block across a table. Which unit should he use to report his findings in accordance with the International System of Units (SI)?

• Kilogram (kg)

• Newton (N)

• Magnitude (m)

Calculate the work done when a force of 10 N moves an object 5 meters in the direction of the force.

• 15 J

• 50 J

• 5 J

• 25 J

Tags

NGSS.MS-PS3-5

Rosie is conducting an experiment in her physics class to measure the force required to move a 5kg block across a table. Which unit should she use to report her findings in accordance with the International System of Units (SI)?

• Kilogram (kg)

• Newton (N)

• Joule (J)

A tennis player hits a ball and give is a change in momentum of 3.3 kg m/s over 5.0 milliseconds. What is the magnitude of the net force on the tennis ball?

• 0.66 N

• 6.6 N

• 66.0 N

• 660 N

Answer explanation

There are 1000 milliseconds in every 1 second. (milli=1000)

Tags

NGSS.MS-PS2-2

Calculate the impulse experienced by a 0.168 kg tennis ball encountering a force of 126 N that changes its velocity by 61.8 m/s

• 10.4 Ns

• 7786 Ns

• 2.03 Ns

• 21.1

Answer explanation

$Impulse\ =\ \Delta p$

Tags

NGSS.HS-PS2-1