Forces and Energy 0.1

Katrina and her sister are fighting, Katrina pushes the sofa towards her sister at 200 N.

Her sister however, pushes at 300 N.

Which side gets pushed past the other sibling?

• Katrina

• Her sister

If a man uses 150 Joules of energy to run a marathon and uses 40 Joules to play dress up with his 6 year old daughter,

how much Joules of energy does he use in total?

• 1.90 Joules

• 19.0 Joules

• 190 Newtons

• 190 Joules

Timmy is walking his dog to the store. He used 70 Joules of energy on the way to the store and uses 70 Joules of energy in the way back. How much Joules of energy does he use?

• 13.0 Joules

• 130 Newtons

• 130 Joules

If a roller coaster slows down at the bottom of a hill, what energy was the most responsible?

• Friction

• Gravity

• Opposition Forces

• Kinetic

If Señior Woofles eats some dog food and goes to play outside, what energy transfer is this?

• Chemical to Kinetic

• Kinetic to Chemical

• Kinetic to Mechanical

• Mechanical to Kinetic

Mary walks along the street with her lambs, suddenly someone tries to steal a lamb. They are pulling at 100 N.

Mary is pulling at 400 N.

How much is the net force?

• 50.0 Newtons

• 500 Newtons

• 300 Newtons

• 4100 Newtons

If Tommy is running at 30km and the truck beside him is driving at 20km, who is transferring more kinetic energy?

• The Birds

• The Truck

• Tommy

If Jessica puts down her teapot on the table and leaves it there for 20 minutes, why is the table hot and not the teapot?

• The energy undergoes a transfusion and is most ultimately consumed.

• The energy is transferred to the table through thermal energy.

Ellie is fixing her bike. Her wheels are running.

She wants to fix the wheels so she stops them by dragging her finger along the wheel.

What energy is she transferring?

• Kinetic to Friction

• Kinetic to Chemical

• Kinetic to Mechanical

Ms.Isra draws a diagram on the board, she drags her pen on the whiteboard. She stops and holds the pen up.

What energy transfusion is this?

• Kinetic to Gravitational Potential

• Gravitational Potential to Kinetic

• Kinetic to Chemical

• Chemical to Kinetic