Refer to the diagram below. A wire carrying current 1 Amps moving downward. 4 meters of this wire is immersed in an external magnetic field of magnitude 2 Teslas that is directed into the page. What is the magnitude of the magnetic force (in N) on the wire due to the magnetic field? (a) 7N (b) 8N (c) 9N (d) 10N X X X X X X X X X X X I X X X хх X X X| x X X Following question 1, what is the direction of the magnetic force on the wire? (a) upward (b) downward (c) to the left (d) to the right

Q: If it were not for air resistance, why would it be dangreous to go outdoors on rainy days?

A: If there was no air resistance, the only force acting on raindrops as they fell would be the Earth’s…

Q: at is unit of force

A: Given:- What is a unit of force? Find:- Explain?

Q: How can we reduce friction?

A: Friction is defined as the resistance offered by a surface on an object, when moving through it.…

Q: If forces always occur in pairs that are equal and opposite, why don’t they always cancel?

A: The third law of motion states that for every action there is an equal and opposite reaction but…

Q: s Weight is between fulcrum point ----and muscle force for example *

A: Elbow joint

Q: Why Friction is important?

A: Friction

Q: Is friction useful?

A: Friction is useful in many ways in our daily life. Without friction, many life activities cannot be…

Q: a net force is

A: The net force is the algebraic sum of the force acting on the object.

Q: In a baseball game, discuss why the catcher wear gloves in catching the fast moving ball and not…

A:

Q: A parachute descends slowly. Why?

A: When any object falls from a height, gravity acts on it, which pulled it downwards, but the air…

Q: Why is it easier to start and stop a car than a train?

A: From Newton's second law a=Fm To start or stop an object, the object has to get accelerated in the…

Q: In order for an object to move, it must be acted upon by a balanced force. O True O False

A:

Q: What are two examples of a wedge, other than a wedge used to chop wood?

A: Wedges are used in different ways for cutting, splitting and tightening, etc

Q: What happens when a moving bumper car collides with a stationary bumper car?

A: The bumper cars are powered by electricity, which is conducted by a pole on the rear of the vehicle…

Q: Why is it that when you are climbing up a wall, you pull down on a hold to move upward?

A: yes, From newton 3rd law of motion which state that for every action there is equal and opposite…

Q: Where would force be acting on?

A:

Q: discuss the analogy in the figure below with friction and frictionless

A: The analogy of the figures below can be given as Fig 1) There is a significant height difference…

Q: Calculate the force on 1800 kg truck that started with a velocity of 10 m/s and came to a final…

A:

Q: Write a note " Inclined plune on is a machine?"

A: In this, figure there is a mechanism…

Q: What is the benefit of an inclined surface?

A: The mechanical advantage of inclined plane is  to decrease the force needed to move an object to a…

Q: Why we tend to fall forward when a car stops suddenly?

A: When the car is moving, our upper part is at rest but the lower part is moving in the forward…

Q: Distinguish between centrifugal and centripetal force.

A: Centrifugal Centripetal     If an object moving in a circle and experiences an outward force…

Q: what is system and agent of force?

A: Force system is a term used to describe a group of forces acting at specified locations

Q: Friction is necessary evil. Why?

A: Friction is necessary evil because it is harmful as well as useful for us.

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.