Mechanics | Relativity Answers

a body of mass 10kg is at rest.calculate the force required to impact 20ms in 10 s

A body is thrown vertically upwards with initial velocity of 100m/s.Find 1.time taken to reach at maximum height 2.maximum height attend 3.velocity after 5 sec 4.velocity after 16 sec. Take a=10m/s2.

respected sir,i am studying in std.11th sem-1 in GSEB.i don't know how to decide 'tan theeta' angle in "concurrent forces"please help me.

A projectile is thrown with the speed of 25 meter per seconds in a direction 30° above the horizontal.
-how long does it take to reach the maximum height.
-how long does it reach the Projectile along in the air.
-how far does it go.

a particle moves in a striaght line with constant acceleration. if it covers 10 m in first second and extra 10 m in next second find its initial velocity?

A record turntable rotating at 33.33 rev/min slows down and stops in 30 sec. after the motor is turned off.
How would i find its constant angular acceleration in rev/min^2

a metallic rod of length 2 m is rigidly clamped at its middle point.A longitudinal wave is set up in rod in such away that there will be 3 nodes on either side of clamped point.Then the wavelength of the longitudinal wave so produced is

a motorboat heads due west at 16m/s across a river that flows due south at 9.0 m/s. What is the resultant velocity?

A 100g cube 2cm on each side is attached to a string and then totally submerged in water. What is the buoyant force, and what is the tension in the rope? I found the buoyant force, but I don't know how to find the tension in the rope. If you could help me that would be amazing. Thank you so much.

A 250g bullet moving at 330m/s hits and travels through a 1.2 kg block of wood, 0.30 m long. If the bullet's speed upon leaving the block is 120 m/s, find...
a) the impulse applied to the block
b) the impulse applied to the bullet
c) the time the bullet spent in the wood
d) the force applied to the bullet