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State Newton's 2nd Law, and use this explain the vertical motion of a parachutist in the descent from her plane to Earth.

Newton's second law: Fnet = m.a. The net force (vector) on an object is directly proportional to the product of its mass (sca...

Akash B. avatar
Answered by Akash B. Physics tutor
3239 Views

What is the difference between a vector and a scalar quantity?

A scalar quantity is one that has a magnitude (size) only, and no associated direction in which that size 'points'. A good example of a scalar is temperature, because temperature has a size (for example 2...

Answered by Frazer N. Physics tutor
4731 Views

A cyclist rides 10km. In the first 5km, they climb a hill, averaging 10km/h. In the second 5km, they descend the hill, averaging 30km/h. What is their average speed over the full 10km?

A common response from the student for the above question is: “I got 20km/h but it says it’s wrong! help i’m really confused”. The following two paragraphs will outline how I might attempt explain this id...

Answered by Shihabul B. Physics tutor
3120 Views

A hot air balloon is travelling at a speed of 5.0m/s at an angle of 60.0 degrees up from the horizontal. Find the vertical and horizontal components.

The diagram would have the following:

An arrow pointing upwards labeled v(y)

An arrow pointing to the right labeled v(x)

An arrow pointing in between those lines with a degree between...

Answered by Marta B. Physics tutor
1870 Views

Define the resistivity of a metal wire

ρ = (AR) / l

where:

ρ is the resistivity of the metal wire

A is the cross sectional area of the specimen wire

R is the electrical resistance of  a uniform metal wire

l i...

Answered by Javier E. Physics tutor
3030 Views

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