F&M Calculation Practice

A 29 kg bicycle slows to a stop at an intersection. The bike's acceleration is uniform at -0.8 m/s². What is the net force acting on the bicycle?

• -23.2 N

• 23.2 N

• 36.25 N

• -36.25 N

Tags

NGSS.MS-PS2-2

A softball player threw a 0.19 kg ball across the field. The softball leaves the player's hand with an acceleration of 395 m/s² to reach a speed of 24.5 m/s. What is the net force (to the nearest Newton) acting on the softball?

• 75 N

• 2,078 N

• 5 N

• 129 N

Tags

NGSS.MS-PS2-2

A baseball player swung a bat to hit a ball. The ball has a mass of 0.15 kg and was struck with a force of 188 N. If resisting forces are ignored, what is the acceleration of the ball to the nearest m/s²?

• 28 m/s²

• 376 m/s²

• 28 m/s²

• 1,253 m/s²

Tags

NGSS.MS-PS2-2

The accelerations of various objects moving down a ramp and the net forces acting on them are recorded in the data table.

Based on the information in the table, which of these objects has the greatest mass?

• Object 1

• Object 2

• Object 3

• Object 4

Answer explanation

You must calculate the mass of each object using the formula F=ma and by using the triangle to rearrange the variables to solve for m, we will now be using the formula m=F/a

Object 1, m= 10

Object 2, m= 30

Object 3, m= 20

Object 4, m= 15

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The graph was made by a group of students to show the motion of a car moving down a hallway. What is the average speed of the car for the time represented on the graph?

• 0.5 m/s

• 2 m/s

• 1,250 m/s

• 0.5 m

Tags

NGSS.MS-PS3-1

A school bus full of students traveled at a rate of 50 km in 0.5 h. What was the average speed of the bus on the trip in km/h?

• 100 km/h

• 0.01 km/h

• 25 km/h

• 100 km

Tags

NGSS.MS-PS3-1

A runner completed a 5 km race in 30 minutes. What was the runner's average speed in km/h?

• 0.17 km/h

• 10 km/h

• 2.25 km/h

• 10 km

If a 2,000 kg van entered the highway with a force of 5,000 N, What is the vehicle's acceleration?

• 2.5 m/s²

• 2.5 m

• 0.4 m/s²

• 25 m/s²

Tags

NGSS.MS-PS2-2

Two forces are applied to a 2 kg box as shown in the photo and the box is on a smooth surface. What would the box's acceleration be?

• 2.5 m/s²

• 10 m/s²

• 7.5 m/s²

• 17.5 m/s²

Answer explanation

To calculate acceleration, you need to determine your values for F and m. They gave you m=2 kg in the question so you have to calculate the net force acting on the box. The box will move a total of 5 N to the right, so F=5N. Using the triangle, your formula to solve for acceleration is a=F/m.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Four toy cars were moving at a constant speed when they experienced an unbalanced force of 12 N. Which car would experience the greatest acceleration when the unbalanced force is applied?

• Red car

• blue car

• green car

• yellow car

Answer explanation

Remember! Part of Newton's 2nd Law of motion states that the less mass an object has, the greater (or faster) the acceleration of that object. There are no calculations necessary to solve this problem (it's ok if you did!).

The Red car is the lightest so it will accelerate the fastest.

Tags

NGSS.MS-PS2-2