Mechanics | Relativity Answers

You drive a nail horizontally into a wall, using a 0.52 kg hammerhead. If the hammerhead is moving horizontally at 4.5 m/s and in one blow drives the nail into the wall a distance of 2.9 cm, determine the average force acting on
(a) the hammerhead
(b) the nail

You drive a nail horizontally into a wall, using a 0.52 kg hammerhead. If the hammerhead is moving horizontally at 4.5 m/s and in one blow drives the nail into the wall a distance of 2.9 cm, determine the average force acting on
(a) the hammerhead
(b) the nail

A man pushes a lawnmower with a force of 170 N at an angle of 37° down from the horizontal. The lawn is 12.0 m wide and requires 16 complete trips across and back. How much work does he do?

An object’s momentum depends upon the object’s
a) mass, speed and acceleration.
b) mass, speed and direction of motion.
c) speed and acceleration.
d) velocity and direction of motion.
e) mass and acceleration.
Write the reason of your above selected choice as well.

Question. No: 4
You drive a nail horizontally into a wall, using a 0.52 kg hammerhead. If the hammerhead is moving horizontally at 4.5 m/s and in one blow drives the nail into the wall a distance of 2.9 cm, determine the average force acting on
(a) the hammerhead
(b) the nail

Question. No: 1
A lift is filled with patients has a total mass of 2055 kg. As the lift begins to go up, the acceleration is 0.75 m/s2. What is the tension in the rope that is lifting the lift? Validate your solution as well.
Question. No: 2
A man pushes a lawnmower with a force of 170 N at an angle of 37° down from the horizontal. The lawn is 12.0 m wide and requires 16 complete trips across and back. How much work does he do?
Assignment 2: (Spring 2014)
Question. No: 3
A bus’s tire rotates at an initial angular speed of 20.5 rad/s. The driver accelerates, and after 4.5 s the tire’s angular speed is 29.0 rad/s. What is the tire’s average angular acceleration during the 4.5 s time interval?
Question. No: 4
An object’s momentum depends upon the object’s
a) mass, speed and acceleration.
b) mass, speed and direction of motion.
c) speed and acceleration.
d) velocity and direction of motion.
e) mass and acceleration.
Write the reason of your above selected choice as well.
Question. No: 4
You drive a nail horiz

Simple harmonic motion takes place under
(a)non conservative force
(b)constant force
(c)conservative force
(d)both conservative and constant force

What is the formula for
1. Time of flight?
2. Time taken to fall ?
3. Motion under gravity?

Two objects are thrown simultaneously from the same height at 45° angles to the vertical with a speed of 20 m per second; one up, the other one down. Find the difference between the heights the objects will be at two seconds later. How are these objects moving in regards to one another?

Water is shooting at the same speed out of the three tubes placed on the ground at different angles of 60°, 45°, and 30° to the horizon. Find the ratio of the greatest heights the streams can reach and the ratio of distances from the mouths of the tubes the points where the streams hit the ground.