Mixed Word Problems

If you ride your bike at an average speed of 4 km/h and need to travel a total distance of 28 km, how long will it take you to reach your destination?

• 7 hours

• 112 hours

• 32 hours

• 24 hours

A tow truck exerts a net horizontal force of 1050 N on a 760 kg car. What is the acceleration of the car during this time?

• 1810 m/s²

• 290 m/s²

• 798000 m/s²

• 1.38 m/s²

Tags

NGSS.MS-PS2-2

The mass of a newborn baby is 3.5 kg. What is the baby's weight?

• 34.3 N

• 3.5 lb

• 15.4 N

• 2.8 N

Tags

NGSS.MS-PS2-4

An alarm clock draws 0.5 A of current when connected to a 120 V circuit. Calculate its resistance.

• 60 ohms

• 0.004 ohms

• 120.5 ohms

• 240 ohms

A small engine causes a 0.3 kg model airplane to accelerate at a rate of 11 m/s². What is the net force on the model airplane?

• 36.7 N

• 33 N

• 3.3 N

• 0.27 N

Tags

NGSS.MS-PS2-2

How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance?

• 2 volts

• 0.5 volts

• 15 volts

• 50 volts

A worker uses a cart to move a load of bricks weighing 680 N a distance of 10 m across a parking lot. If he pushes the cart with a constant force of 209 N, what amount of work does he do? (*force & direction must match)

• 6800 J

• 2090 J

• 8890 J

• 471 J

Tags

NGSS.HS-PS3-2

A sample of iron receives 50.J of heat energy that raises the temperature of the iron by 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?  (show your work)

• 25g
• 30g
• 20g
• 50g

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A 20 N effort force applied to the handle of a door produces a 44 N resistance force. What is the mechanical advantage of the handle?

• 2.2

• 4.5

• 880

• 24

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

An object moves 20 km in 5 h. What is its speed?

• 4 km/h

• 100 km/h

• 0.25 km/h

• 15 km/h