Physics Answers

Construct an example to show that the cross product of two vectors in 3 d does not transform like a vector under a reflection and therefore is a pseudo vector

The driver of a 2.0 × 103 kg red car traveling on the highway at 45m/s slams on his brakes to avoid striking a second yellow car in front of him, which had come to rest because of blocking ahead as shown in above Fig. After the brakes are applied, a constant friction force of 7.5 × 103 N acts on the car. Ignore air resistance.

(a) Determine the least distance should the brakes be applied to avoid a collision with the other vehicle?

How the companies

like Samsung, Apple, Foxcon etc use

the concept of heat transfer in

manufacturing ipads,iphones to

make them more faster and cheaper

for the general public?

Question No. 1

The driver of a 2.0 × 103 kg red car traveling on the highway at 45m/s slams on his brakes to avoid striking a second yellow car in front of him, which had come to rest because of blocking ahead as shown in above Fig. After the brakes are applied, a constant friction force of 7.5 × 103 N acts on the car. Ignore air resistance.

(a) Determine the least distance should the brakes be applied to avoid a collision with the other vehicle?

(b) If the distance between the vehicles is initially only 40.0 m, at what speed would the collision occur?

(c) Write your conclusive observations on the result obtained from this numerical. i.e. the importance of Physics in daily life.

A basketball player throws a desperation shot at the buzzer from the backcourt

1.0 second before the game ended with the score tied. If the ball was released at a

velocity of 12.0 m/s at an angle of 38O and if the release was made at the same level as

the basket from a distance of 14.2 m, did he score? Why?

complete answer and solution plss..help me

SA12. Illustrate the path of a projectile launched at a velocity of 150.0 m/s at an angle of 50O with the horizontal and find, illustrate, and label the following in the same illustration you have. a. The viy of the projectile b. The vix of the projectile c. Its vy 2.0 seconds after it was launched d. Its vf based on letter c e. Its maximum height (𝐦𝐚𝐱 𝐝𝐲 ↑) f. The time it will reach a height of 3.0 m (𝒕 ↑) g. Its position/location 4.0 seconds of its flight (𝐝𝐲 ↑) h. Its range ( R )

Current through branch a b

The following data were collected during a short race between

two friends.

Velocity (m/s) 0 0.5 1 1.5 2 2 4 6 2 0

Time (s) 0 2 4 6 8 10 12 14 16 18

a) Describe the different sections of the graph.

b) Determine the acceleration over the first eight seconds.

c) Determine the maximum acceleration.

d) Using the graph calculate the displacement:

i) over the first eight seconds

ii) the total race.

e) Find the maximum velocity reached by the runner.

What is the acceleration of a 50 kg object pushed with a force of 500 newtons?

A 50 kg skater pushed by a friend accelerates 5 m/s2 . How much force did the friend apply