Physics Chapter 5 Test
A vertical vector of 3 units combined with a horizontal vector of 4 units has a resultant of
5 units
Joshua is attracted toward Earth by a 500-N gravitational force. The Earth is attracted toward Joshua with a force of
500 N
The resultant of a 30-N force and a 40-N force cannot possibly be
80 N
If action is a foot kicking a soccer ball, the reaction is an equal force on the
foot
As a ball bounces from a floor, its acceleration off the floor between bounces is
g
The normal force that acts on a block of ice that slides on a ramp
gets progressively less as the slope of the ramp increases.
A player catches a ball. If action is the force of the ball against the player's glove, reaction is the
glove against the ball.
A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The acceleration is
greater on the bug
Neglecting air resistance, once a tossed ball leaves your hand
only the force due to gravity acts on it
Neglecting air resistance, once a tossed ball leaves your hand
only the force due to gravity acts on it.
When you walk, you push on the floor to the left and the floor
pushes you to the right.
Nellie tosses a ball upward at an angle. Neglecting air resistance, the horizontal component of the initial velocity
remains constant
The force due to gravity that acts on a block of ice that slides down an icy ramp
remains equal to mg at all angles
The force due to gravity that acts on a block of ice that slides down an icy ramp
remains equal to mg at all angles.
The force exerted on the tires of a car that directly accelerate it along a road is exerted by the
road
When Nellie Newton hangs by a pair of ropes at different angles to the vertical, the rope tension is greater in the rope that makes the
smallest angle to the vertical.
When a tennis racquet hits a ball
the ball hits the racquet
When a cannonball is fired from a cannon, which undergoes the greater acceleration?
the cannonball
The force that propels a heavy truck along a highway is provided by
the highway pushing back on the wheels of the truck.
Earth pulls on the Moon with a certain force. Relative to this force, the pull of the Moon on Earth is
the same
A mosquito has a collision with the windshield of a massive high-speed truck. The force of impact on the mosquito is ________ the force on the truck, and the acceleration of the mosquito is ________ the deceleration of the truck.
the same as; more than
You stand on your skateboard and exert a 50-N push on the wall next to you. If your mass is 60 kg you'll momentarily accelerate from the wall at about
0.8 m/s2
Whenever one object exerts a force on a second object, the second object exerts a force on the first that a) is opposite in direction. b) is equal in magnitude. c) occurs at the same time. d) All of these.
All of these
A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle that undergoes the greatest change in velocity will be the
Volkswagen
As the sloped surface supporting a shoe becomes steeper a) friction needed to keep it at rest increases. b) the normal force becomes less. c) the shoe's weight mg remains unchanged. d) all of the above
all of the above
When a skateboarder pushes on a wall, a) the wall pushes on the skateboarder b) such a push couldn't happen unless the wall pushed on the skateboarder. c) an interaction occurs between the skateboarder and the wall. d) all the above
all the above
Art museums use weaker wires than those used in homes because paintings in museums
are suspended by pairs of vertical wires
An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the
arrow's push against the bowstring.
Arnold Strongman and Suzie Small each pull very hard on opposite ends of a rope in a tug-of-war. The greater force on the rope is exerted by
both the same
When you rub your hands together, you
cannot push harder on one hand than the other
A shoe on an inclined surface barely remains at rest when friction equals the
component of mg parallel to the surface.
The normal force that acts on a block of ice that slides on a ramp
decreases as the slop of the ramp increases
The normal force that acts on a block of ice that slides on a ramp
decreases as the slope of the ramp increases.
Nellie tosses a ball upward at an angle. Neglecting air resistance, the vertical component of the initial velocity
decreases with time to reach the top.
A pair of toy freight cars, one twice the mass of the other, fly apart when a compressed spring that joins them is released. Acceleration will be greater for the
lighter car
The amount of force with which a boxer's punch lands depends on the
mass of what's being hit.
When you jump vertically upward, strictly speaking, you cause Earth to
move downward
To produce an acceleration to a system there
must be a net force on the system
A boulder falls due to gravity. The reaction to the force on the boulder is
the boulder pulling up on Earth
You run horizontally at 4 m/s in a vertically falling rain that falls at 4 m/s. Relative to you, the raindrops are falling at an angle of
45°.
One end of a rope is pulled with 100 N, while the opposite end also is pulled with 100 N. The tension in the rope is
100 N
When a baseball player bats a ball with a force of 1000 N, the reaction force that the ball exerts against the bat is
1000 N
An astronaut of mass 70 kg weighs 700 N on Earth. His weight on Mars, where the "a" is 3.7 m/s^2
260 N
The airspeed of an airplane is 200 km/h. When it is caught in a 200-km/h crosswind, its speed across the ground below is
283 km/h
When a karate chop breaks a board with a 3000-N blow, the amount of force that acts on the hand is
3000 N
A piece of rope is pulled by two people in a tug-of-war. Each exerts a 400-N force. What is the tension in the rope?
400 N
An axe is swung against a tree with a blow of 4000 N. The force that acts on the axe during this event is
4000 N
The emphasis of the orange-and-apple sequence in your textbook is
defining systems
When the neck of an air-filled balloon is untied and air escapes, the balloon shoots through the air. The force that propels the balloon is provided by the
ejected air
The force with which Earth pulls on the Moon is
equal in magnitude to the force that Moon pulls on Earth
The force with which Earth pulls on the Moon is
equal in magnitude to the force that Moon pulls on Earth.
Horizontal and vertical components of velocity are equal when the projection angle is
equal to 45°.
Two identical carts have a compressed spring between them. When the spring is released, the carts recoil from each other with oppositely directed accelerations that are
equal.
When a boxer hits a punching bag, the strength of his punch depends on how much force the bag can
exert on the boxer's fist
When a squid pushes against water, the squid moves forward because the water
exerts a net forward force.
For every action force, there must be a reaction force that
is equal in magnitude
The net force on a kicked soccer ball can be zero when
it is kicked by two feet with equal and opposite amounts of force.
A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is
the same for both
An automobile and a golf cart traveling at the same speed collide head-on. The impact force is
the same for both
A force is a push or pull that is required to change the
the state of motion of an object.
A massive truck and a golf cart have a head-on collision with equal amounts of force. The least amount of acceleration occurs for
the truck
A force interaction requires at least
two forces
You cannot exert a force on a wall
unless the wall simultaneously exerts the same amount of force on you.
