Calculations for final

A high speed train travels with an average speed of 300 km/h.  The train travels for 5 h.  How far does it travel?

• 6 km
• 150 km
• 1500 km
• 60 km

How long would it take someone to drive 570 miles at a speed of 75 miles/hour?

• 7.6 h
• 42,750 h
• 0.13 h
• 10 h

An object with a mass of 400 kg accelerated at a speed of 10 m/s². What is the force of the object?

• 40 N
• 40 J
• 4000 N
• 4000 J

What is the weight of an object on Earth that has a mass of 14 kg?

• 1.4 N
• 14 N
• 137.2 J
• 137.2 N

A skateboarder is moving at a speed of 15 m/s.  What is the kinetic energy if the skateboarder and her board has a mass of 80 kg?

• 9000 J
• 600 J
• 1200 J
• 720,000 J

A 65 kg person is sitting 6 m from the ground on a balcony.  What is the person's GPE?

• 380 J
• 382.2 J
• 3822 J
• 195 J

Find the force a man pushing a cart 50 m if 1,875 J of work are done.

• 0.027 N
• 93,750 N
• 37.5 J
• 37.5 N

Find the mechanical efficiency of a machine that does 650 J of work if the input is 725 J.

• 89.7 %
• 0.897 %
• 1.12 %
• 111.5 %

There is a 49 Ω resistance in a heating element.  It is plugged into a 110 V circuit.  How much current passes through the heating element?

• 0.45 A
• 2.2 I
• 2.2 A
• 5,390 I

What is the electric power when a voltage of 120 V drives a 6 A current through a toaster?

• 720 kW
• 720 W
• 20 W
• 20 kW