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2 years ago

2. What is a vector measurement?

Physics

1 answer:

Annette [7]2 years ago

7 0

Answer:

Vector is a measurement that refers to both the magnitude of the unit and the direction of the movement the unit has taken.

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45. An object with a mass of 25 kg accelerates east at a rate of 7 m/s? What fiet force is acting on the object?

ZanzabumX [31]

Answer:

According to newton's second law of motion F=ma so

Explanation:

Data:-M=25kg ,a=7m/s² F=? ,solution:-F=ma ,F=25×7=175kgm/s² or N

6 0

4 years ago

A rabbit trying to escape a fox runs north for 8.0 m, darts northwest for 1.0 m, then drops 1.0 m down a hole into its burrow. W

kifflom [539]

Answer:

9.61 m

Explanation:

d1 = 8 m north

d2 = 1 m north west

d3 = 1 m vertically down

Write the displacements in vector form

$\overrightarrow{d_{1}}=8\widehat{j}m$

$\overrightarrow{d_{2}}=1 \left ( -Cos45\widehat{i}+Sin45\widehat{j} \right )m$

$\overrightarrow{d_{2}}=\left ( -0.707\widehat{i}+0.707\widehat{j} \right )m$

$\overrightarrow{d_{3}}=-1\widehat{k}m$

The resultant displacement is given by

$\overrightarrow{d}=\overrightarrow{d_{1}}+ \overrightarrow{d_{2}} +\overrightarrow{d_{3}}$

$\overrightarrow{d}=-0.707\widehat{i}+ 8.707\widehat{j} - 4\widehat{k}m$

The magnitude of displacement is given by

d =

$\sqrt{\left ( -0.707 \right )^{2}+\left ( 8.707 \right )^{2}+\left ( -4 \right )^{2}}$

d = 9.61 m

4 0

3 years ago

In which item is energy stored in the form of gravitational potential energy? A. A slice of bread B. A compressed spring C. An a

marysya [2.9K]

The things that determine the amount of an object's gravitational potential energy are ...

-- mass of the object

-- gravitational acceleration in the place where the object is

-- height of the object above the ground or the floor

A). a slice of bread; No. It's still a slice of bread even if it's on the ground.

B. A compressed spring; No. It's still a compressed spring even if it's on the ground.

C. An apple on a tree; Yes ! It can't be an apple on a tree if it's on the ground.

D. A stretched bow string; No. It's still a stretched bowstring even if it's on the ground.

3 0

3 years ago

Read 2 more answers

Place a small object on the number line below at the position marked zero. Draw a circle around the object. Mark the center of t

Viefleur [7K]

It’s is D bc it is and idk you should do it

6 0

3 years ago

Which of the following has the largest kinetic energy?

Hoochie [10]

Option C,

Reason

Kinetic energy is proportional to the square of velocity. Thus the higher the velocity the higher will be the kinetic energy

K.E. dog = 1/2 x 10 x (0.44704 x 30)^2 m/s = 899.14 J

K.E. bullet = 1/2 x 0.02 x (0.44704 x 8000)^2 m/s = 127,878 J

5 0

4 years ago