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## Which is the best metric unit to measure the length of a paper clip?

When we measure the length of a paperclip, we can use inches (in) if we’re in the United States or centimeters (cm) in countries that use the metric system.

centimeter

## What metric unit would you use to measure the mass of a strawberry?

The gram and kilogram are two units used to measure mass in the metric system .

## What are the basic units of measure within the metric system?

The SI system, also called the metric system, is used around the world. There are seven basic units in the SI system: the meter (m), the kilogram (kg), the second (s), the kelvin (K), the ampere (A), the mole (mol), and the candela (cd).

## What unit would you use to measure the distance between two cities?

Answer: The standard unit of measurement in all countries is Metric so therefore the distance between two cities or two towns is measured in Kilometres per hour.

## What unit would you use to measure the height of a building?

Choosing Appropriate Units of Measure

Quantity Appropriate unit of measure
Height of a person Feet and inches, or centimeters
Weight of a person Pounds or kilograms
Height of a high-rise building Meters or feet
Height of a mountain peak Meters or feet

## Why is normal force less than weight on an incline?

The normal force is less than the weight on an inclined plane because it is always perpendicular to the surface. At an inclination of zero degrees, the normal force is directed 90 degrees upward while the weight is directed 90 degrees downward.

## Is normal force greater than weight on an incline?

The normal force is always perpendicular to the surface, and since there is no motion perpendicular to the surface, the normal force should equal the component of the skier’s weight perpendicular to the slope.

## How do you find the normal force on an incline?

1. The normal force of an object placed on a sloping surface is always perpendicular to the surface.
2. mgsinθ
3. Take g = 9.8ms-2.
4. (a) Σ F = ma = mg sin θ where mg sin θ is the component of the force parallel to the slope.

## Are normal force and weight equal on an incline?

So to directly answer your question, the normal force is never equal to the weight of the object on an inclined plane (unless you count the limiting case of level ground). It is equal to the weight of the object times the cosine of the angle the inclined plane makes with horizontal.

## What is the normal force of an object on an incline?

When an object is placed on an inclined plane, its weight vector can be resolved into the normal force, which is equal to the force of the object perpendicular to the plane, and a parallel force, which pushes the object down the inclined plane.

## At what angle is the most work done?

Work done will be minimum if angle is 90 degrees, i.e force and displacement are perpendicular to each other. Work done will be maximum if angle is 0 or 180 degrees, i.e force and displacement are parallel to each other.

## Why use a ramp if it requires the same amount or more work as lifting the mass up to the same height?

Because energy is conserved, it takes the same amount of energy to lift a box as it does to push it up a ramp to the same position (ignoring any friction). Pushing it up the ramp takes less force, but it must be applied through a greater distance.

## Why is it easier to push something up a ramp?

A ramp like the one in the Figure below is another example of an inclined plane. Inclined planes make it easier to move objects to a higher elevation. The sloping surface of the inclined plane supports part of the weight of the object as it moves up the slope. As a result, it takes less force to move the object uphill.

## Is it easier to push or pull uphill?

In pushing,component of force adds up to the body and due to this normal reaction from ground increases resulting in increase in friction. Hence pushing becomes harder compared with pulling. In pulling normal reaction from ground decreases so friction also will be decreased. Therefore pulling is easier than pushing.

## Why do you need to use force in moving a ball up a ramp?

(1) Force making the ball move up the ramp. (2) Friction Force (fighting against the Force that is moving the ball up the ramp). (3) Gravity – this is the Force all objects will experience if they are on our Earth.

## How much force is required to push the box straight up the slope at a constant speed?

Now here we need to maintain the constant speed, the force must be equivalent in the direction of motion. Hence we need 98.10 N force to pull the box on given slope to move it with constant speed.