# 6a Summative Quiz

5 Questions | Total Attempts: 29

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• 1.
(2.0 Basic) During which of the following parts of a roller coaster ride would forces on you be balanced?
• A.

Being pulled up the first hill at a steady 2.5m/s

• B.

Making a sharp turn at 25m/s.

• C.

Slowing down slightly as you go up the second hill.

• D.

Increasing speed as you go down the first hill.

• 2.
(2.0 Basic) Check each of the following situations which describe balanced forces.
• A.

Jogging at a steady 5 m/s

• B.

An elevator starts moving down

• C.

A car going at 65 mph speed limit on a straight highway

• D.

A fly ball speeds up as it falls back down

• E.

A bus slams on the brakes when a light turns red

• F.

A cup of milk sits on the counter

• 3.
(3.0 Target) There are plans to build a water park section in VeloCity, USA. In one ride, a small boat will be pulled through the water by a cable. The cable is designed to be able to exert 5000N of force on the boat. They’ve also done tests to show that friction with water will put a force of 1000N on the boat in the opposite direction. If the cable is pulling with 5000N of force, what will be the net force in Newtons acting on the boat? (answer with only the number, no unit)
• 4.
(3.0 Target) A car driving at a steady 30mph is exerting 35,000N of force on the road to push itself forward. The rolling resistence of the tires on the road (similar to friction, but applied to things that roll) exerts an opposite force of 20,000N.If air resistence is the only other force on the car, how much force must it be exerting.
• A.

15,000N

• B.

55,000N

• C.