# physics

The work that a force does by acting on an object is equal to what?

1) the product of force (in the direction of motion) and distance and is negative if the force and motion are in the same direction

2) the product of force (in the direction of motion) and distance and is positive if the force and motion are in the same direction

3) the product of force and distance without regard to direction

4) the product of distance and kinetic energy

5) the product of momentum and force (in the direction of motion)

1. 👍
2. 👎
3. 👁
1. 1J = 1N-m
so, work = force * distance

now consider whether the quantities are vectors or scalars.

1. 👍
2. 👎
2. This question is flawed, except for a very beginning student. Work is force IN THE DIRECTION OF MOVEMENT times distance moved.

1. 👍
2. 👎

## Similar Questions

1. ### physics

If the resultant force acting on a 2kg object is equal to (3i+4j)N, what is the change in kinetic energy as the object moves from (7i-8j)m to (11i-5j)m?

1. A 2.5 kg mass at rest on a horizontal surface is acted upon by an applied horizontal force of 150 N. A frictional force of 100 N acts on the mass. How much work is done on the mass? my answer: would the work be 0? 2. When a

3. ### Physic (concepts-please check my thoughts)

A net torque applied to a rigid object always tends to produce? a)translational acceleration b) rotational equilibrium c) rotational acceleration d) rotational inertia e) none of these work (c) Torque produces torsion and tends to

4. ### Physics -- check answers

1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3.

1. ### physics

As a 2.0-kg object moves from (2i+5j)m to (6i-2j)m, the constant resultant force acting on it is equal to (4i-3j)N. If the speed of the object at the initial position is 4.0 m/s, what is its kinetic energy at its final position?

2. ### physics

A 1.8 kg object is pulled along the floor with a force of 7.0 N acting horizontally. If the object accelerates at 2.4m/s^2, how much kinetic friction is acting? how do i do this? could you please explain step by step

3. ### physics

Which of the following statements about work is or are true? (More than one statement may be true.) A. Negative net work done on an object always reduces the object's kinetic energy. B. If the work done on an object by a force is

4. ### Algebra

Suppose that a constant force is applied to an object. Newton's Second Law of Motion states that the acceleration of the object varies inversely with its mass. A constant force acting upon an object with mass 12 kg produces an

1. ### Physics

An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. How much work is done by the lifting force (include units)? b.) How much work is done by the Earth on the object? c.) What is the net work

2. ### Physics

The kinetic energy K of an object of mass m moving at a speed v is defined as K=(1/2)mv^2. It seems reasonable to say that the speed of an object--and, therefore, its kinetic energy--can be changed by performing work on the

3. ### Science

Which statements are true about the weight of an object and the buoyant force exerted on that object when it is placed in a fluid? A) They work in opposite directions. B) They are always equal in strength. C) They determine

4. ### Physics

a 1.00-kg object is observed to accelerate at 10.0m/s∧2 in a direction 30.0 north of east. the force F2 acting on the object has magnitude 5.00 N and is directed north. determine the magnitude and direction of the force F1