Mechanics | Relativity Answers

one way to get a car unstuck is to tie one end of a strong rope to the car and the other end to a tree, then push the rope at it's midpoint at right angles to the rope. Draw a free body diagram and explain why even a small force on the rope can exert a large force on the car.

what is equilibruim and how can we ralate it with newtons laws of motion

as we know that pressure and stress have same formulas but why pressure is a scalar and stress is a vector?

when pressure on a sphere is increased by 80 atmosphere than its volume decreases by 0.01% find the bulk modulus of elasticity of material

Hi,
A stick figure is pushing three boxes across the screen. The mass of the blue box is 77kg, the mass of the red box is 79kg and the mass of the yellow box is 64kg.

What is the friction force on the blue box?
_________Newtons

What is the friction force on the red box?
_________Newtons
What is the friction force on the yellow box?
_________Newton
Once the boxes are moving, the stick figure finds that if he pushes with a force of 2156N, the boxes have an acceleration of 4.8m/s². What is the coefficient of kinetic friction, μk?

WHEN A POLAR BEAR JUMPS ON AN ICEBERG, HE NOTICES THAT HIS 1870 NEWTON WEIGHT IS JUST SUFFICIENT TO SINK THE ICEBERG. WHAT IS THE WEIGHT OF THE ICEBERG?

Dionte is riding the Giant Drop at Great America. If Dionte free-falls for 2.6 second. What will be his final velocity.

A man stands on a scale while riding an elevator. The mass of the man is 111kg.
Remember: a scale actually measures the normal force between an object and the floor!





What will the scale say when the elevator is stopped on the ground floor? Newtons



What will the scale say when the elevator is ascending at 4.3m/s²? Newtons



What will the scale say when the elevator is descending at -4.6m/s²? Newtons

What will the scale say if the elevator is ascending at the same rate as gravity? Newtons

What will the scale say if the elevator is descending at the same rate as gravity? Newtons

What will the scale say if the elevator is ascending at a constant speed of 19m/s? Newtons

What will the scale say if the elevator is descending at a constant speed of 13m/s? Newtons

At what rate does the elevator have to descend for the scale to read 300Newtons? m/s²

At what rate does the elevator have to ascend for the scale to read 1598Newtons? m/s²

A 34.0 crate is initially moving with a velocity that has magnitude 4.47 in a direction 37.0 west of north. much work must be done on the crate to change its velocity to 7.24 in a direction 63.0 south of east?

Car A starts from rest at t = 0 and travels along a straight road with a constant of 2 m/s2
until it reaches a speed of 27 m/s. Afterwards it maintains this speed. Also, when t = 0,
car B located 2000 m down the road is travelling towards A at a constant speed of 20
m/s. Determine the distance travelled by car A when they pass each other. (ans: 1097.3
m).