An 70 kg spacewalking astronaut pushes off a 632 kg satellite, exerting a 112 N force for the 0.5 s it takes him to straighten his arms. What Impulse is delivered to the astronaut from the satellite?What's the speed of the astronaut after he pushes off? (We'll call the astronaut and satellites initial velocity 0.)What's the speed of the satellite after the astronaut pushes off? How far apart are the astronaut and the satellite after 1 min? Note after pushing off, the...
1) A mover pushes a 5.87 kg box with a 48.1 N constant
horizontal force up a 14.9° ramp that has a height of 2.56 m. If
the ramp is assumed to be frictionless, find the speed of the box
as it reaches the top of the ramp using work and energy.
2) A 1100 kg car is traveling 35.5 m/s when it comes up to the
bottom of a 14.0° hill. If the car coasts up the hill and...
A person pushes on a doorknob with a force of 5.00 N. The
direction of the force is at an angle of 30.0° from the
perpendicular to the surface of the door. The doorknob is located
0.800 m from axis of the hinges of the door. The door begins to
rotate from rest with uniform angular acceleration and makes half a
revolution in 2.23 seconds. What is the moment of inertia of the
door about the hinges?
A 100 kg shot-putter pushes forward and upward on a 4 kg shot
with a force of 1000 N. This force acts at an angle of 60° above
horizontal.
How much of this 1000 N force acts in the upward
direction?
How much of this 1000N force acts in a horizontal
direction?
What is the resultant force?
A flea jumps by exerting a force of
1.27 10-5 N straight down on the ground. A
breeze blowing on the flea parallel to the ground exerts a force of
1.12 10-6 N on the flea. Find the direction
and magnitude (in m/s2) of the acceleration of the flea
if its mass is 6.0 10-7 kg. (Let us assume
that Fwind points to the right. We will
consider this to be the +x direction and vertical to be
the +y direction.)
magnitude m/s2
direction °...
A horizontal force with a magnitude of 30 N pushes a block which
has a mass of 4.19 kg on the floor which has a coefficient of
kinetic friction of 0.51.
How many Joules of work does the force do to the floor-beam system
as the block travels 3.86 m along the floor?
During movement on the floor, the heat energy in the block
increases by 39.5 J. What is the Joule of increase in heat energy
in the floor?...
A person pushes a 500kg crate with a force of 700 N across a
concrete floor. Given the coefficicent of kinetic friction is 0.100
what is the acceleration of the crate across the floor?
A 121-kg astronaut (including space suit) acquires a speed of
2.20 m/s by pushing off with her legs from a 1600-kg space capsule.
Use the reference frame in which the capsule is at rest before the
push. Part A: What is the velocity of the space capsule after the
push in the reference frame? Express your answer to two significant
figures and include the appropriate units. Enter positive value if
the direction of the velocity is in the direction of...
A 55 kg astronaut who weighs 170 N on a distant planet is
pondering whether she can leap over a 4.0-m-wide chasm without
falling in.
If she leaps at a 15∘ angle, what initial speed does she need to
clear the chasm? v=?
A block with a mass of 3.2 kg is pulled by a force of 60 N up a
ramp with a coefficient of kinetic friction of .05 on a 12°
incline.
a. What is the magnitude of the block’s acceleration?
b. Draw a free body diagram of this block.