J
Jeff S
Guest
I just turned in this quiz and want to make sure that my answers are correct. Could someone who does well in chem tell me the answers to these?
1. Which of the following relationships is correct? (1 point)
1 N = 1 kg
1 N = 1
1 N = 1
1 N = 1
2. When a pair of balanced forces acts on an object, the net force that results is (1 point)
greater in size than both forces combined.
greater in size than one of the forces.
equal in size to one of the forces.
equal to zero.
3. As you push a cereal box across a tabletop, the sliding friction acting on the cereal box (1 point)
acts in the direction of motion.
equals the weight of the box.
is usually greater than static friction.
acts in the direction opposite of motion.
4. If a force of 10 N is applied to an object with a mass of 1 kg, the object will accelerate at: (1 point)
0.1
9
10
11
5. 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: (1 point)
nine times greater than its weight on Earth’s surface.
three times greater than its weight on Earth’s surface.
one-third its weight on Earth’s surface.
the same as its weight on Earth’s surface.
6. In which of the following are action and reaction forces involved?
(1 point)
when a tennis racket strikes a tennis ball
when stepping from a curb
when rowing a boat
all of the above
7. What is conserved when two objects collide in a closed system?
(1 point)
acceleration
momentum
speed
velocity
8. When opposite poles of two magnets are brought together, the poles
(1 point)
attract each other.
repel each other.
cancel each other.
cause a net force of zero.
9. Which of the following universal forces is the most effective over long distances? (1 point)
electric
gravitational
magnetic
strong nuclear
10. The centripetal force acting on a satellite in orbit
(1 point)
acts as an unbalanced force on the satellite.
changes the direction of the satellite.
is a center-directed force.
all of the above
1. Which of the following relationships is correct? (1 point)
1 N = 1 kg
1 N = 1
1 N = 1
1 N = 1
2. When a pair of balanced forces acts on an object, the net force that results is (1 point)
greater in size than both forces combined.
greater in size than one of the forces.
equal in size to one of the forces.
equal to zero.
3. As you push a cereal box across a tabletop, the sliding friction acting on the cereal box (1 point)
acts in the direction of motion.
equals the weight of the box.
is usually greater than static friction.
acts in the direction opposite of motion.
4. If a force of 10 N is applied to an object with a mass of 1 kg, the object will accelerate at: (1 point)
0.1
9
10
11
5. 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: (1 point)
nine times greater than its weight on Earth’s surface.
three times greater than its weight on Earth’s surface.
one-third its weight on Earth’s surface.
the same as its weight on Earth’s surface.
6. In which of the following are action and reaction forces involved?
(1 point)
when a tennis racket strikes a tennis ball
when stepping from a curb
when rowing a boat
all of the above
7. What is conserved when two objects collide in a closed system?
(1 point)
acceleration
momentum
speed
velocity
8. When opposite poles of two magnets are brought together, the poles
(1 point)
attract each other.
repel each other.
cancel each other.
cause a net force of zero.
9. Which of the following universal forces is the most effective over long distances? (1 point)
electric
gravitational
magnetic
strong nuclear
10. The centripetal force acting on a satellite in orbit
(1 point)
acts as an unbalanced force on the satellite.
changes the direction of the satellite.
is a center-directed force.
all of the above