Hw Part 2

A 500kg car exerts 5,000,000 N of force (5x106 N) on a 100 kg billboard (large advertisement) located on the roadside when the car hits it with a head on collision. With what force does the billboard exert on the car?  1000 N 238,000 N 5,000,000 N 12,000,000 N

Thor drops his hammer with a mass equal to 300 billion elephants off of Stark Tower (425 m). How fast will it be traveling just before it strikes the ground? part b - Tony Stark drops his lucky penny at the same time. How fast will his lucky penny be traveling just before it strikes the ground?

Az + pgh, pv? Question 15 A car traveling at 26.4 m/s hits a tree. A passenger in the car, who has a mass of 64.0 kg moves forward a distance of 56.0 cm while being brought to rest by an inflated air bag. Assuming that the force is constant, what is the magnitude of the force on the passenger? 39,000

5. Use the new equation from question 4 to solve this problem: a 50-kg woman wearing a seatbelt is traveling in a car moving at 10 m/s. The car is suddenly brought to a stop, in a time span of 0.50 seconds. How much force must the seat belt exert on the woman so that she remains in her seat? 6. What is the speed of a 2.0 x 10°kg space shuttle after 10 seconds of its lift-off thrust of 1.0 x 10'newtons? Note: thrust is a kind of force. 7. If a net force of 10 N acts on a 6-kg mass for 8.0 s, what is the total change of momentum of the mass? (careful!) (but be careful about being careful!!) 8. What impulse is needed to bring a resting 1500-kg car up to a speed of 20 m/s ?

The froghopper holds the title of the best jumper of the animal world. A 0.0198-gram (1.98 X 10-5 kg) froghopper can accelerate from 0m/s to 4m/s in only one one thousandth of a second (0.001 s) as it jumps. What is the force delivered to the froghopper as it makes this jump?

5. The graph shows the variation with time t of the force F acting on an object of mass 15000 kg. The object is at rest at t=0. A. B. C. F/KN D. 6ms-1 12 ms-¹ 7 180 m s¹ 6 LO 5 4 3 What is the speed of the object when t= 30 s? 0.18 ms ¹ 2 1 0 0 5 10 15 t/s 20 25 30

Two forces act on a 2.50 kg object, the gravitational force and a second, constant force. The object starts from rest and in 1.20 s is displaced (5.50î – 3.30j) m. Write the second force in unit vector notation. (Enter your answer in kg · m/s. Assume the gravitational force acts in the -ĵ direction.) kg · m/s2 II

The position of a 2.6 kg mass is given by x=(2t3−5t2) m, where t is in seconds. What is the net horizontal force on the mass at t=0s?   What is the net horizontal force on the mass at t=1s?

A person of mass 50kg is falling at a terminal velocity of 60m/s. how much force does a superhero need to exert if it takes 0.1sec to stop the fall? If the person can withstand a maximum acceleration of 7g, what minimum time should it take the superhero to stop the fall?   ans: 1.02s

You and another astronaut are in space.  You throw a tool to them that has a mass of 15kg.  Your mass is 91kg and the other astronaut's mass is 88kg. Initially you and the other astronaut are at rest.  You threw the tool at a speed of 8m/s.  What is your velocity after you threw the tool?

133% + 1. Consider each of the following situations, state which of the Newton's Laws of Motion BEST illustrates the phenomenon and explain why. [. a) A person using a paddle to push a canoe forward is an example b) Whiplash can result when a car is hit violently from behind. The law explains how c) One of the Canadian women Soccer team members kicking the ball and launching it towards the goal - is an of the law. this happens to a person (without a headrest) in a car Explain. example of the that is hit from behind. law. Explain. Explain. Whiplash ED US 9 1.

A 2.0 kg object moving to the right with speed 0.50 m/s experiences the force is shown. What are the object's speed and direction after the force ends? * F. (N) 2 0. t (s) -2 - 0.50 m/s left At rest 0.50 m/s right 1.0 m/s right 2.0 m/s right 12

Object 1: mass= 0.016300 (kg) weight= (Newtons) distances 1.545 (m) 1.485 (m) 1.375 (m) 1.215 (m) 1.005 (m) t (s) g (m/s²) t (s) g (m/s²) t (s) g (m/s²) t (s) g (m/s²) t (s) g (m/s²) 1 0.56270 0.55116 0.53080 0.49970 0.45360 2 0.56220 0.55028 0.53100 0.49884 0.45470 3 0.56190 0.55030 0.53098 0.49791 0.45428 Mean g (m/s?) Overall Mean g (m/s²):_ Standard Deviation (m/s²): %Error: Trial

A 2.0-kg brick is moving at a speed of 6.0 m/s. How large a force F  is needed to stop the brick in a time of 0.7 ms?

Two forces act on a 2.90 kg object, the gravitational force and a second, constant force. The object starts from rest and in 1.20 s is displaced (4.10 3.30ĵ) m. Write the second force in unit vector notation. (Enter your answer in kg. m/s². Assume the gravitational force acts in the -ĵ direction.) kg. m/s² F

900 750 600 0 0 2 6. Henry and Elevator : Henry gets into an elevator on the 50th floor of a building and stands on a weighing scale. The elevator begins moving at t=0 s. The figure shows his scale reading over the next 12s. a) Is the elevator's initial direction up or down? Explain how you can tell. b) What is Henry's mass? c) How far Henry travelled at t = 12s? 4 6 8 10 12 -1 (s)

g = 10 m/s^2 * %3D Write your complete justification of the answer on your paper. (To accept your answer, you should write it as .0 just one-digit below the comma and without unit): The two masses in the figure are released from rest. After the 3.0-kg mass has fallen 1.5 m, it is moving with a speed of 3.8 m/s. What is the change in mechanical energy done on the system during this time interval by the frictional force on the 2.0 kg mass? 2.0 kg 30 kg

2. A mass of 4 kg is dropped with a velocity of 5 m/s. a. Find an expression for the velocity of an object if the force due to air resistance is 60v. b. Find the limiting velocity for the object.

A runaway train car that has a mass of 1.68e+4 kg travels at a speed of 7.60 m/s down a track. Compute the time required for a force of 1.57e+3 N to bring the car to rest.  a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8   ....s

When a constant force is applied to an object, the acceleration of the object varies inversely with its mass. When a certain constant force acts upon an object with mass 25 kg, the acceleration of the object Is 3 m/s. When the same force acts upon another object, its acceleration is 5 m/sf. What is the mass of this object? I kg

4 5 6 A baseball has a mass of 145 g. A bat exerts a force of 18,400 N on the ball, What is the acceleration of the ball? O 1.27 x 102 m/s? O 2.67 x 103 m/s? O 1.27 x 105 m/s? O 2.67 x 106 m/s? Mark this and return Save and Exit

A batter strikes a baseball of mass 0.15 kg with a force of 18,000 N. What is the acceleration of the baseball? Question 9 options: 9.8 m/s/s 120,000 m/s/s 2,700 m/s/s 8.3 m/s/s

On Planet #1, you drop a stone from rest, 57.0 m above the ground, and the stone hits the ground 4.26 s later. What is the value of g on Planet #1?     26.76 m/s^2     6.28 m/s^2     3.14 m/s^2     13.38 m/s^2

A force of 15N acts on a body of mass 2kg. Calculate the acceleration produced. A 7.5 ms 2 B 30 ms ² C 5 ms 2 D 2 ms 2

at rest and his mass is 50 kg, how fast is he moving 5. Einstein walks into an elevator cab and steps on a scale. If Einstein's mass is 62.0 kg, what does the scale read while the cab is accelerating upward at 3.20 m/s²?

Physical quantities are classified as either vectors or scalars. Classify the following terms as either vectors or scalars: Force ii. Mass iii. Temperature iv. Velocity v. Momentum vi. Time

What is the magnitude of the net force needed to bring a 2085 kg car to rest from 25.6 m/s in 9.3 seconds?

A 75 kg student leaps from a burning hotel window to be caught by a fire net. His speed as he reaches the net is 20 m/s, and he is stopped by the net after sinking 1.15 m into it. Calculate the force of the net on the man. O -12,000N O +12,000N O +13,000N O -13,000N

You are not on earth. You shoot a firework into the air. It reaches a certain peak height and then explodes into three pieces. One fragment travels exactly north. A second fragment travels exactly northwest.(a) Choose values for the following. None of them can be 0. i. The value of gravitational acceleration on this planet 10mls² ii. The velocity of the firework as it leaves the ground 10mls iii. The mass of the firework 4kg iv. The masses of the three fragments 1kg, 2kg,           1kg v. The velocity of the northbound fragment after the explosion 8mls vi. The velocity of the northwest-bound  fragment after the explosion 8mls(b) Draw the following four photos.  i. Photo 1 is a side view of the launch of the firework.  ii. Photo 2 is a top (bird’s-eye) view of the firework just before the explosion. iii. Photo 3 is a top (bird’s-eye) view of the firework just after the explosion. iv. Photo 4 is a side view of the fragments as they land.(c) Label the origin and axes on photo 1 and photo…

Mary applies a force of 70 N to push a box with an acceleration of 0.60 m/s2. When she increases the pushing force to 82 N, the box's acceleration changes to 0.80 m/s2. There is a constant friction force present between the floor and the box. What is the mass of the box in kilograms?