3 years ago

Why are vectors important in physics?

1 answer:

7 0

They are quantities with magnitude and direction like velocity, we'd be doomed without them to be honest , just knowing how fast something is going isn't enough, you want to know where it is going

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Change a speed of 72.4 miles per hour to its equivalent in meters per second.

4vir4ik [10]

Answer:

Speed in meter/sec will be 32.1777 m /sec

Explanation:

We have given speed = 72.4 miles per hour

We have to convert this speed in meter per second

We know that 1 miles = 1.6 km

So 72.4 miles = 72.4×1.6= 115.84 km

We also know that 1 km = 1000 m

So 115.84 km $=115.84\times 10^3m$

We know that 1 hour = 60×60 = 3600 sec

So $72.4miles/hour=\frac{72.4\times 1600m}{3600sec}=32.1777m/sec$

7 0

3 years ago

NEED HELP!!!!

melamori03 [73]

Answer:

The correct choice is D. Concentric exercise can be hard on joints, so she should be very careful.

4 0

2 years ago

A 100 kg father and his 50 kg daughter stand on ice skates on a frozen pond. The daughter pushes on her father with a force of 5

Lana71 [14]

Answer:

Both feel same magnitude force.

Explanation:

Given that

Mass of father = 100 kg

Mass of daughter = 50 kg

From the third law of Newtons :

Every action have it reaction in opposite direction.It means that if any object apply a force on the other object then first object also feel force of same magnitude but in opposite direction.

It means that both father and her daughter will feel same magnitude of same but in opposite direction.

7 0

3 years ago

Read 2 more answers

13. What bone runs parallel to the fibula?<br> A. Radius<br> B. Femur<br> C. Tibia<br> D. Ulna

Paraphin [41]

Answer:

C, Tibia.