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Mechanics | Relativity
A plant pot of mass 3 kg falls from a balcony and drops 10.5 m to the ground. It falls freely under gravity. Find the speed of the plant pot just before it hits the ground.
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Mechanics | Relativity
A certain liquid has a unit weight of 57 KN/m^3. Compute the mass density in kg/m^3.
Mechanics | Relativity
An object have mass, m is dropped from rest from a height, h. As it strikes the ground, it imparts an impulse to the ground proportional to( by assuming no energy loss)
A. m√h
B. mh
C. mh^2
D. None of above
A. m√h
B. mh
C. mh^2
D. None of above
Mechanics | Relativity
During a baseball game, a batter hits a high
pop-up.
If the ball remains in the air for 6.41 s, how
high above the point where it hits the bat
does it rise? Assume when it hits the ground
it hits at exactly the level of the bat. The
acceleration of gravity is 9.8 m/s
2
.
Answer in units of m
pop-up.
If the ball remains in the air for 6.41 s, how
high above the point where it hits the bat
does it rise? Assume when it hits the ground
it hits at exactly the level of the bat. The
acceleration of gravity is 9.8 m/s
2
.
Answer in units of m
Mechanics | Relativity
A car traveling at a constant speed of 32.5m/s squares passes a trooper hidden behind a billboard.1 second later the trooper starts the car with a constant acceleration Of 3.8m/s squared.how long after the trooper starts the chase.answer in units of s
Mechanics | Relativity
what is force when a car of mass 10 kg is moving with constant acceleration 5 m/s^2.
Mechanics | Relativity
how length varies which is moving with speed order to light of speed.
Mechanics | Relativity
Raindrops keep fallin' on your head. Assuming the drops are 2mm in diameter and your head is struck by 12 of them per second, what is the average force on your head in N ? Note that this problem requires you think about momentum and several other concepts from the class. Hint: the coefficient of air drag is
Mechanics | Relativity
You are on a fishing trip, not catching anything, and bored - time for physics! You drop your 50g weight to the bottom of the lake under constant tension from the string of magnitude 0.1N. The damping constant for your falling weight is 2.5kg/s.
a) What is the terminal velocity of the weight? Give your answer in m/s and assume the positive direction is upwards.
b) If it takes 500s for the weight to reach the bottom of the lake, how deep is the lake? Give your answer in m.
Mechanics | Relativity
Two identical beads are attached to free ends of two identical springs of spring constant k=((2+(3^(1/2)))mg)/((3^(1/2))R). Initially both springs make angle of 60° at fixed point N where one end of both springs are fixed. Normal length of springs is 2R. Where R is radius of smooth ring over which beads are sliding. Ring is placed in vertical plane and beads are at symmetry with respect to vertical line passing through diameter of ring. What is the normal force and relative acceleration between the beads at initial moment?
