1. At the start of his race, an 85-kg runner pushes against the starting block, exerting...
1. At the start of his race, an 85-kg runner pushes against the
starting block, exerting an average force of 1700 N . The force
that the block exerts on his foot points 20∘ above the
horizontal.
Determine the horizontal speed of the runner after the force is
exerted for 0.30 s .
Express your answer to two
significant figures and include the appropriate units.
Homework Answers
Add Answer to:
1. At the start of his race, an 85-kg runner pushes against the
starting block, exerting...
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of...
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of 81.0 N directed along the handle, which is at an angle of 45.0° to the horizontal Part A Draw the free-body diagram showing all forces acting on the mower. Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. + 2 O No elements selected We were unable to transcribe this imageConstants - Part B A...
Mark pushes his broken car 140 m down the block to his friend's house. He has to exert a 160 N horizontal force to push...
Mark pushes his broken car 140 m down the block to his friend's house. He has to exert a 160 N horizontal force to push the car at a constant speed. How much thermal energy is created in the tires and road during this short trip? Express your answer to two significant figures and include the appropriate units.
in animation 1 a 1.5-kg block receives a push and in the process pushes against a...
in animation 1 a 1.5-kg block receives a push and in the process pushes against a 4.5-kg block. (position is in meters and time is in seconds). Conversely, in animation 2,the same 4.5-kg block receives the same push, now from the opposite direction, and in the process pushes against the 1.5-kg block as shown. All surfaces are frictionless. The magnitude of the finger applied by the finger is calculated to be 15.6N since the acceleration is 2.612. 1.a the force...
A 53 kg sprinter, starting from rest, runs a 60 m long race in 7.2 s with...
A 53 kg sprinter, starting from rest, runs a 60 m long race in 7.2 s with a constant acceleration. Part A How much work does the sprinter do during the first 2.5 s of the race? Express your answer to three significant figures and include the appropriate units. Part B What is the sprinter's average power output during the first 2.5 s of the race? Express your answer to three significant figures and include the appropriate units. Part C How...
Exorciso 6.42 A block of ice of mass 3.90 kg is placed against a horizontal spring...
Exorciso 6.42 A block of ice of mass 3.90 kg is placed against a horizontal spring that has force constant k = 170 N/m and is compressed a distance 2.80x10-2 m. The spring is released and accelerates the block along a horizontal surface. You can ignore friction and the mass of the spring. Part A Constants Calculate the work done on the block by the spring during the motion of the block from its initial position to where the spring...
A massive steel cable drags a 20 kg block across a horizontal, frictionless surface A 120...
A massive steel cable drags a 20 kg block across a horizontal, frictionless surface A 120 N force applied to the cable causes the block to reach a speed of 4 1 m/s in a distance of 2.1 m. What is the mass of the cable' Express your answer to two significant figures and Include the appropriate units.
A 1300-kg car pulls a 400-kg trailer. The car exerts a horizontal force of 3.6 ×...
A 1300-kg car pulls a 400-kg trailer. The car exerts a horizontal force of 3.6 × 103 N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective friction coefficient of 0.19 for the trailer. Express your answer to two significant figures and include the appropriate units. The answer should be in terms of FTC=
An 85-g arrow is fired from a bow whose string exerts an average force of 110...
An 85-g arrow is fired from a bow whose string exerts an average force of 110 N on the arrow over a distance of 83 cm . What is the speed of the arrow as it leaves the bow? Express your answer to two significant figures and include the appropriate units. PLEASE BOX ANSWER.
QUESTION 2 The drawing shows a person mass-59 kg. doing push-ups. Find the force exerted by...
QUESTION 2 The drawing shows a person mass-59 kg. doing push-ups. Find the force exerted by the floor on each foot, assuming that the person holds this position. Express your answer is Sl units with 3 or more significant figures 0.90 m 1.50 m QUESTION 3 A uniform lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray is 0.11 kg. On the tray is a 1 kg plate of food and a...
What average force is required to stop a 1700 kg car in 9.0 s if the...
What average force is required to stop a 1700 kg car in 9.0 s if the car is traveling at 85 km/h ? Express your answer to two significant figures and include the appropriate units. Enter positive value if the direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in the direction opposite to the initial velocity.
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of 81.0 N directed along the handle, which is at an angle of 45.0° to the horizontal Part A Draw the free-body diagram showing all forces acting on the mower. Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. + 2 O No elements selected We were unable to transcribe this imageConstants - Part B A...
Exorciso 6.42 A block of ice of mass 3.90 kg is placed against a horizontal spring that has force constant k = 170 N/m and is compressed a distance 2.80x10-2 m. The spring is released and accelerates the block along a horizontal surface. You can ignore friction and the mass of the spring. Part A Constants Calculate the work done on the block by the spring during the motion of the block from its initial position to where the spring...
A massive steel cable drags a 20 kg block across a horizontal, frictionless surface A 120 N force applied to the cable causes the block to reach a speed of 4 1 m/s in a distance of 2.1 m. What is the mass of the cable' Express your answer to two significant figures and Include the appropriate units.
QUESTION 2 The drawing shows a person mass-59 kg. doing push-ups. Find the force exerted by the floor on each foot, assuming that the person holds this position. Express your answer is Sl units with 3 or more significant figures 0.90 m 1.50 m QUESTION 3 A uniform lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray is 0.11 kg. On the tray is a 1 kg plate of food and a...
Most questions answered within 3 hours.
-
find the critical value associated with a right sided hypothesis of
the mean using a sample...
asked 1 hour ago -
Which of the following statements is true with respect to a
simple linear regression model?
a....
asked 1 hour ago -
The energy required to remove an electron from a surface of a
solid element is called...
asked 3 hours ago -
How would you train your employees to avoid risks of using
mobile devices?
asked 3 hours ago -
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 4 hours ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 5 hours ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 5 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 7 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 7 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 8 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 10 hours ago -
Please answer what the maximum and minimum force is, and the
angle on the ion is...
asked 10 hours ago