What property does inertia depend on?
mass
A force of 25 newtons east and a force of 25 newtons west act concurrently on a 5.0-kilogram cart. What is the acceleration of the cart?
0m/s2
A student pulls a 60.-newton sled with a force having a magnitude of 20. newtons. What is the magnitude of the force that the sled exerts on the student?
20N
The gravitational force of attraction between two objects would be increased by
Choice A- doubling the mass of both objects, only
The diagram below shows a horizontal 12-newton force being applied to two blocks, A and B, initially at rest on a horizontal, frictionless surface. Block A has a mass of 1.0 kilogram and block B has a mass of 2.0 kilograms.
What is the magnitude of the acceleration of block B?
4m/s2
A 15-kilogram cart is at rest on a horizontal surface. A 5-kilogram box is placed in the cart. Compared to the mass and inertia of the cart, the cart-box system has
Choice A- more mass and more inertia
An object weighing 2.0 newtons is pushed across a horizontal, frictionless surface by a horizontal force of 4.0 newtons. What is the magnitude of the net force acting on the object?
2N
A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. What is the magnitude of the force that the object exerts on the child?
100N
The diagram represents two satellites of equal mass, A and B, in circular orbits around a planet.
Compared to the magnitude of the gravitational force of attraction between satellite A and the planet, the magnitude of the gravitational force of attraction between satellite B and the planet is
Choice C- one-fourth as great
Which situation describes an object that has no unbalanced force acting on it?
Choice C- a hockey puck moving at constant velocity across ice
The magnitude of an unbalanced force applied to a 4.0-kilogram crate is 10. newtons. If the magnitude of this applied unbalanced force is doubled, the inertia of the crate is
halved
unchanged
doubled
quadrupled
B unchanged
A net force of one newton will
accelerate a 1-kg mass at 1.0 m/s2
accelerate a 1-kg mass at 9.8 m/s2
lift a l-kg mass vertically at a constant speed of 1.0 m/s
lift a 1-kg mass vertically at a constant speed of 9.8 m/s
Choice A
A 60.-kilogram man is pushing a 30.-kilogram lawn mower. Compared to the magnitude of the force exerted on the lawn mower by the man, the magnitude of the force exerted on the man by the lawn mower is
one-quarter as great
one-half as great
the same
twice as great
Choice C- the same
As a meteor moves from a distance of 16 Earth radii to a distance of 2 Earth radii from the center of Earth, the magnitude of the gravitational force between the meteor and Earth becomes
Choice C- 64 times as great
A box weighing 46 newtons rests on an incline that makes an angle of 25° with the horizontal. What is the magnitude of the component of the box’s weight perpendicular to the incline?
42 N
As shown in the diagram below, an open box and its contents have a combined mass of 5.0 kilograms. A horizontal force of 15 newtons is required to push the box at a constant speed of 1.5 meters per second across a level surface.
The inertia of the box and its contents increases if there is an increase in the
Choice B- mass of the contents of the box
he diagram below represents two forces, F1 and F2, acting concurrently on a block sliding on a horizontal, frictionless surface.
Describe the motion of the block.
Moving at a constant speed.
A baseball bat exerts a force of magnitude F on a ball. If the mass of the bat is three times the mass of the ball, the magnitude of the force of the ball on the bat is
Choice A- F
When Earth and the Moon are separated by a distance of 3.84×108 meters, the magnitude of the gravitational force of attraction between them is 2.0×1020 newtons. What would be the magnitude of this gravitational force of attraction if Earth and the Moon were separated by a distance of 1.92×108 meters?
Choice D- 8.0 × 1020 N
How would the mass and weight of an object on the Moon compare to the mass and weight of the same object on Earth?
Mass would be the same but its weight would be less on the Moon.
Which object has the greatest inertia?
Choice D- a 20.0-kg mass moving at 1.00 m/s
A 5.0-kilogram box is sliding across a level floor. The box is acted upon by a force of 27 newtons east and a frictional force of 17 newtons west. What is the magnitude of the acceleration of the box?
2m/s2
Earth’s mass is approximately 81 times the mass of the Moon. If Earth exerts a gravitational force of magnitude F on the Moon, the magnitude of the gravitational force of the Moon on Earth is
Choice A -F
What is the magnitude of the gravitational force of attraction between two 0.425-kilogram soccer balls when the distance between their centers is 0.500 meter?
4.82 × 10−11 N
A 4.0-kilogram object is accelerated at 3.0 meters per second2 north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at what acceleration?
6.0 m/s2