2nd 6 wks

Maya and Benjamin decide to jog in the park. If they take 0.5 h to jog 4,000 m, what is their average speed?

• 8000 m/h

• 2000 m/h

• 0.000125 m/h

• 800 m/h

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Sophia is pushing a shopping cart in the supermarket. For the cart to change its motion, an _______ force must act on it.

• balanced

• unbalanced

• gravitational

• electrical

Scarlett and Aiden are working on a project to increase friction. They can achieve this by:

• making the surface rough

• making the surface smooth

• adding oil to the surface

• none of these

Aiden weighs 850 Newtons on Earth. What is his mass?

m= F/g g=9.8 N/kg

• .011 N

• 8330 kg

• 86.7 kg

• 8330 N

Arjun is riding a 20 kg bike and accelerates at 10 m/s² to catch up with his friends Elijah and Oliver. What is the net force acting on the bike?

F= ma

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

Isla pushes a wall with a certain force. According to Newton's third law, the wall will exert a(n) _______ and _______ force back on Isla.

• Equal and similar

• Equal and opposite

• Equal and different

• Greater and opposite

James and Priya are playing catch. James throws the ball to Priya with a certain force. According to which law does the ball move in the direction James threw it?

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

• None of these

Evelyn, Luna, and Zoe were on a road trip. When Luna, who was driving, suddenly applied the brakes, everyone was pushed forward into their seat belts. Which law of motion does this scenario illustrate?

• 1st Law

•  2nd Law

• 3rd Law

• 4th Law

Reorder the following steps to solve for this word problem:

Two asteroids that have masses of 1.8 x 10^9 kg and 9.2 x 10^16 kg.  Their centers are separated by a distance of 2500 m.  Find the gravitational force between them.

• 1.1E10N