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Which of the following relationships is correct?
A) 1N = 1 kg
B) 1N = 1 kg times m/s squared
C) 1 N = 1 kg times m
D) 1N = 1kg times m/s squared
When a pair of balanced forces acts on an object, the net force that results is _____.
Equal to Zero
As you push a cereal box across a tabletop, the sliding friction acting on the cereal box _____.
Acts in the direction of opposite motion.
An open parachute increases air resistance of a falling sky diver by _____.
Increasing surface area.
An orange might roll off your cafeteria tray when you stop suddenly because of _____.
The orange's inertia
If a force of 10N is applied to an object with a mass of 1 kg, the object will accelerate at _____.
10 m/s squared.
The acceleration due to gravity on the surface of Mars is about one-third the acceleration due to gravity on Earth's surface. The weight of a space probe on the surface of Mars is about _____.
One-third its weight on Earth's surface
In which of the following are action and reaction forces involved?
A) When a tennis racket strikes a tennis ball
B) When stepping from a curb
C) When rowing a boat
D) All of the above
What is the momentum of a 50-kilogram ice skater gliding across the ice at a speed of 2 m/s?
100 kg times m/s squared
With which of the following is the weak nuclear force associated?
B) Nuclear energy
C) Ocean tides
D) Static cling
The gravitational force between two objects increases as mass _____.
Increases or distance decreases.
The centripetal force acting on a satellite in orbit _____.
A) Acts an an unbalanced force on the satellite
B) Changes the direction of the satellite
C) Is a center-directed force
D) All of the above
If the forces acting on an object produce a net force of zero, the forces are called _____.
It usually takes more force to start an object sliding than it does to keep an object sliding because static friction is usually _____ than sliding friction
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