Newton's Laws

What is true about the inertia of two cars, Car A of mass 1,500 kilograms and Car B of mass 2,000 kilograms?

A.
Car A and Car B have the same inertia.
B.
Car A has more inertia than Car B.
C.
Car B has more inertia than Car A.
D.
Both the cars have negligible inertia.

What is an example of the strong nuclear force?

A.
stability of an atom
B.
a book at rest
C.
attraction between the opposite poles of a magnet
D.
downward acceleration of an object thrown up into the air

If a metal ball suspended by a rod is at rest, which force is responsible for balancing the force due to gravity?

A.
the tension in the rod
B.
the friction of the rod
C.
the electromagnetic force
D.
the strong force around the rod

Which interaction does not take place due to field forces?

A.
interaction between protons and electrons
B.
interaction between a ball in flight and the earth below it
C.
interaction between Mars and the Sun
D.
interaction between a pen and paper while you write

Which is a good example of a contact force?

A.
protons in the nucleus of an atom
B.
a ball falling down after it's thrown up into the air
C.
a satellite orbiting Earth
D.
a bat hitting a ball

Elle is playing with a ball in a bus that moves in a straight line with constant velocity. What can you say about the motion of the ball in the moving bus if Elle throws the ball vertically upwards?

A.
The ball will fall back to Elle.
B.
The ball will land ahead of Elle.
C.
The ball will land behind Elle.
D.
The ball will move to the right of Elle.

A force of 20 newtons is exerted on a chair from its right and a force of 12 newtons is applied from its left. What is the net force acting on the chair and in what direction will the chair tend to move?

A.
The net force acting on the chair is 8 newtons, and the chair moves toward the left.
B.
The net force acting on the chair is 32 newtons, and the chair moves toward the left.
C.
The net force acting on the chair is 8 newtons, and the chair moves toward the right.
D.
The net force acting on the chair is 32 newtons, and the chair moves toward the right.

Which statement is true according to Newton's first law of motion?

A.
In the absence of an unbalanced force, an object at rest will stay at rest and an object in motion will come to a stop.
B.
In the absence of an unbalanced force, an object at rest will start moving and an object in motion will come to a stop.
C.
In the absence of an unbalanced force, an object at rest will stay at rest and an object in motion will stay in motion.
D.
In the absence of an unbalanced force, an object at rest will start moving and an object in motion will stay in motion.

A car is moving at a constant speed along a straight line. Which statement is true about the forces acting on the car?

A.
The net force acting on the car from all directions is zero.
B.
The net force acting on the car is greater than the car's weight.
C.
The net force acting on the car is in the direction of the car's motion.
D.
The net force acting on the car is in the opposite direction of the car's motion.

An object of mass 5 kilograms is moving across a surface in a straight line with a speed of 3.5 meters/second. What amount of force would be required to keep the object in motion if you ignore the surface friction?

A.
0 newtons
B.
17.5 newtons
C.
3.5 newtons
D.
5 newtons

A 10–kilogram box is at static equilibrium, and the downward pull of gravity acting on the box is 98 newtons. What is the minimum force that would be required to just pick up the box?

A.
exactly 98 newtons in the downward direction
B.
slightly greater than 98 newtons in the upward direction
C.
exactly 98 newtons in the upward direction
D.
any value lesser than 98 newtons in the downward direction

If a hockey puck is made to slide along a straight line on a completely frictionless surface, which statement about the motion of the hockey puck is true?

A.
The hockey puck will come to a halt immediately.
B.
The hockey puck will continue moving with constant velocity along a straight line.
C.
The hockey puck will accelerate and continue moving in straight line.
D.
The hockey puck will continue moving in random direction.

What is the magnitude of force required to accelerate a car of mass
1.7 × 10^3 kilograms by 4.75 meters/second2?

A.
3.6 × 10^2 newtons
B.
1.7 × 10^3 newtons
C.
8.1 × 10^3 newtons
D.
9.0 × 10^3 newtons

A car of mass 1,000 kilograms is moving initially at the speed of 22 meters/second. When the brakes are applied, it takes the car 3.0 seconds to stop. What is the force required to stop the car?

A.
2.2 × 10^4 newtons
B.
2.5 × 10^3 newtons
C.
7.3 × 10^3 newtons
D.
1.4 × 10^3 newtons

With what magnitude of force does a ball of mass 0.75 kilograms need to be hit so that it accelerates at the rate of 25 meters/second2? Assume that the ball undergoes motion along a straight line.

A.
10 newtons
B.
19 newtons
C.
33.3 newtons
D.
40 newtons

When Isabella pushes a box of mass 5.25 kilograms with a force of 15.7 newtons, it accelerates by a rate of 2.50 meters/second2. What is the force due to friction in this scenario?

A.
-2.60 newtons
B.
5.50 newtons
C.
-7.75 newtons
D.
13.5 newtons

Elle is pushing a box of mass 7.0 kilograms with the force of 25 newtons. If the force of friction is 2.6 newtons, what is the value of acceleration of the box?

A.
0.7 meters/second squared
B.
2.6 meters/second squared
C.
3.2 meters/second squared
D.
3.6 meters/second squared

Anna applies a force of 19.5 newtons to push a book placed on a table. If the normal force of the book is 51.7 newtons, what is the coefficient of kinetic friction?

A.
0.01
B.
0.20
C.
0.38
D.
0.48

A force of 16.0 newtons is sufficient to set a box that is at rest into motion. If the coefficient of static friction is 0.380, what is the normal force acting on the box?

A.
6.08 newtons
B.
16.0 newtons
C.
16.4 newtons
D.
42.1 newtons

Two college teams, A and B, are playing a game of tug of war. Team A applies a force of 103 newtons, but the rope does not move in any direction. What can you say about the force applied by Team B?

A.
Team B applies the same force as Team A.
B.
Team B applies more force than Team A.
C.
Team B applies less force than Team A.
D.
Team B does not apply any force on Team A.

What is the sum of the forces in an action reaction pair?

A.
always less than zero
B.
always greater than zero
C.
always equal to zero
D.
sometimes less than zero

A 52–newton bird feeder is tied to a cord, which is attached to a tree branch. Describe the tension force of the rope.

A.
A 52–newton tension force pulls down on the branch.
B.
A 52–newton tension force pulls up on the bird feeder.
C.
A 52–newton tension force pulls down on the branch, and a 52–newton tension force pulls up on the bird feeder.
D.
The tension equals zero since the upward and downward forces on the rope are equal.

A force of 5.25 newtons acts on an object of a mass 25.5 kilograms. How far is the object from the center of Earth? (The value of G is 6.673 × 10^-11 newton meter^2/kilogram^2. The mass of Earth is 5.98 × 10^24 kilograms.)

A.
2.1 × 10^7 meters
B.
4.4 × 10^7 meters
C.
5.8 × 10^7 meters
D.
6.9 × 10^7 meters

If an object has a mass of 50 kilograms, what would it weigh on Uranus, where the acceleration due to gravity is 10.5 meters/second2?

A.
4.77 newtons
B.
47.7 newtons
C.
52.5 newtons
D.
525 newtons

The value of acceleration due to gravity (g) on a point 10,000 kilometers above sea level is about 1.49 meters/second2. How much will an object, which weighs 98 newtons on the surface of Earth, weigh on this point? The value of acceleration due to gravity on Earth is 9.8 meters/second2.

A.
0.152 newtons
B.
7.35 newtons
C.
14.9 newtons
D.
146.02 newtons

The value of acceleration due to gravity (g) on Pluto is about 0.61 meters/second2. How much will an object that weighs 250 newtons on Earth weigh on Pluto? Note that the value of acceleration due to gravity on Earth is 9.8 meters/second2.

A.
3.5 newtons
B.
15.6 newtons
C.
18.2 newtons
D.
59.78 newtons

Object A attracts object B with a gravitational force of 10 newtons from a given distance. If the distance between the two objects is doubled, what is the new force of attraction between them?

A.
2.5 newtons
B.
5 newtons
C.
20 newtons
D.
100 newtons