Force Weight Mass Calculations

A 800N man is playing on a seesaw with son who has a weight of 200N. If the child is sitting 3 meters away, how far will the man have to sit to balance the seesaw?

• 0.75m

• 3m

• 1.5m

• 1m

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

In the diagram above, two masses, one with mass m, the other with mass M = 2m are resting on a uniform plank of length L that pivots at its midpoint. If the mass m is at the far end of the plank, how far away from the pivot should the mass M be to balance the plank in a horizontal position shown?

• L/2

• L/3

• L/4

• L/6

Tags

NGSS.MS-PS2-2

What is the distance the masses on the right of the fulcrum need to be to balance with the two masses on the left?

• .65 m

• .56 m

• .79 m

• .39 m

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A state of equilibrium is also seen below. Each of the cars weighs the same 9800 N. Despite the fact that there is only one car on the left-hand side that is 9 m from the fulcrum, the torques balance because, the cars on the right-hand side, are ____meters from the fulcrum.

• 4.5 m

• 3 m

• 1 m

• 2 m

Tags

NGSS.MS-PS2-4

A seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?

• The larger person moving further away from the center.

• Moving the smaller person closer to the center.

• Moving the smaller person further from the center.

• Making the larger person do nothing.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If a system is in static equilibrium, it must have the following 2 conditions:

• ∑τ=0

• Constant acceleration

• ∑F=0

• Positive forces only

Determine the net force required to accelerate a 540-kg ultralight car at 2.7 m/s². use the correct formula

• 1458 N

• 200 N

• 55 N

• 1987 N

Tags

NGSS.MS-PS2-2

Use the free-body diagram shown to determine the acceleration of this 91.8-kg object.(remember net Force)

• 150 m/s/s down

• 1.63 m/s/s down

• 5.2 m/s/s down

• 110 ms/s/s up

Tags

NGSS.MS-PS2-2

Which of these best states Newton's Second Law?

• The greater the mass of an object the greater the force needed to change its motion.

• The greater the mass of an object the less force needed to change its motion.

• The mass of an object does not effect the force needed to change its motion

Based on Newton's second law, which object will move the FASTEST?

• Block 1

• Block 2

• Block 3

• Block 4

Tags

NGSS.MS-PS2-2