How are hovercrafts supported

Q: repulsive force between

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Q: Bumpers are built with springs that compress to provide a stopping force without, hopefully, denting…

A: It is given that

Q: A team exerts a force of 10 N towards the south in a tug of war. The other, opposite team exerts a…

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Q: Why is overall stopping distance for cars less than lorries

A: Stopping distance depends on , frictional force acting on the tire by the ground. Normally it does…

Q: a man in a sled, with a total mass of 125kg slides down a grassy hill and reaches a speed of 8 m/s…

A: Total mass of man and sled, m=125 kg   The velocity of man and sled at the bottom, u=8 m/s   The…

Q: Determine the PEg of a 8.91-kg bowling ball raised 2.08-m off the floor while standing in an air…

A: To find the potential energy we will calculate the total height of the ball first and then we will…

Q: Nellie Newton applies a force of 50 N to the end of a lever, which is moved a certain distance. If…

A: It is given that

Q: A loading car is at rest on a track forming an angle of 25° with the vertical as shown. The gross…

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Q: A rope is tied to two posts 6 meters apart. A block having a mass of 20kg was hanged at the middle…

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Q: Why Friction is important?

A: Friction

Q: Suppose it takes a force of 4,200 N to acceler to stop it from that same speed in 4.0 s? O 8,400 N O…

A: GivenForce (F)=4200 NTime (t1)  =8.0 s

Q: by applying brakes. The retarda

A: Given: Acceleration of car: a=-4 m·s-2 Time needed to stop, t=20 s Final velocity, v=0

Q: Why is rebounding an important skill in basketball

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Q: Softball mass of 0,29 kg is pitched of 86.4 km/h. Whin it reaches the plate, it may haved slowed. by…

A: Given, The mass of the soft ball, m =0.29 kg  Speed, vi =86.4 km/hr = 24 m/s  Distance, d =15 m  And…

Q: What is the driving force between the two ends of

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Q: A ball is thrown vertically up with a velocity of 33.7 km/hr at the edge of a 52.6-m cliff.…

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Q: Newton applies a force of 50N to the end of lever, which is moved a certain distance. If the other…

A: Torque with respect to fixed end will be a constant with respect to fixed reference positionThat is,

Q: Pushed a 10kg box of rocks across the floor. The coefficient of friction between the box and the…

A: It is given that, m=10 kgμ=0.2

Q: A shopping cart accelerates when a stronggust of wind blows across the Walmart parking lot, blowing…

A: Given, F=12 Nm=23 kgt= 5 s

Q: A car carrying a 75-kg test dummy crashes into a wall at 25 m/s and is brought to rest in 0.1 s.…

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Q: repulsive force

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Q: When a 9.09-kg mass is placed on top of a vertical spring, thespring compresses 4.18 cm. Find the…

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Q: Calculate the force needed to bring a 450-kg canoe to rest from a speed of 10.8 km/h in a distance…

A: Given problem is based on the laws of kinematics. As we know that the kinematical equations are very…

Q: A 400 kg car moving at 30m /s breaks to a stop in 100 meters. The average frictional force (in…

A: Using kinematic equation, the expression for find acceleration is v2=u2+2ada=v2-u22d Substitute…

Q: a bowling ball and golf ball are dropped from the same height, which object will have the greater…

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Q: spring auncher A metal ball was placed on a spring launcher; the ball was at rest until the spring…

A: The ball is placed on a spring launcher. It remains at rest until the spring is pulled with a force…

Q: How are Newton's laws and the law of conservation of energy very important?

A: Newtons laws of motion are foundation of classical mechanics. Newton's laws of motion used to solve…

Q: Sam rolls a ball off a tabletop. Compared with a slow roll , will a faster-moving ball hit the floor…

A: Faster moving ball will hit the ground with greater speed.

Q: 10. A 65 kg swimmer moving at 14 m/s comes to a stop in 2 m. Find the net force on the 3,200N)…

A: Initial velocity of swimmer U = 14 m/s  Final velocity of swimmer V = 0 m/s  displacement d = 2 m…

Q: ) A force of 12.0N is applied to a 32.5g wooden block resting against pring causing it to compress…

A: Given Mass m = 32.5 g = 32.5 × 10-3 kg Compression x = 13 cm = 0.13 m

Q: A ball of mass 0.8 kgs is dropped from a height of 10.4 m. Calculate its velocity at a height 2.7…

A: Take the downward direction to be positive. The equation of motion is given by, v2=u2+2as Here, v is…

Q: Large birds like pheasants often walk short distances. Small birds like chickadees never walk. They…

A: The maximum walking speed is limited by the size of the legs of the animals. the maximum walking…

Q: True or false "Cars are less efficient in cold weather"

A: The efficiency of the cars is less in cold weather. This is because there is an increase in energy…

Q: Why friction is needed?

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Q: ball is released from rest at the left of the metal track shown. Assume it has only enough friction…

A: Given that: We need to Rank KEs from greatest to least at each point.

Q: Consider an ideal pulley system. If you pull one end of the rope 1m downward with a 50-N force, show…

A: Given data:Force, F1 = 50 N d1 = 1 mF2 = 200 N d2 = ?

Q: Two blocks ( 15 Kg and 25kg) are shown on a 40 degree incline connceted by a rope. An applied force…

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Q: the working of a spring scale is based on Newton's law . true or false

A: To Determine The working principle of Spring Scale

Q: Atwood Machine.  - A mass of 5 kg is suspended on 1 side of a pulley and 5.1 kg is loaded on the…

A: From Newton's 2nd law of motion we know, if a net force Fnet acts on a system with a total mass M,…

Q: A car (mass = 2,335 kg) is traveling +5.8 m/s when the driver applies the brakes.  The car moves…

A: The mass of the car, m is 2335 kg. The initial velocity of the car, u is +5.8 m/s. Since the driver…

Q: Based on the diagram below, answer the following question based on a roller coaster wvith a mass of…

A: A roller coaster is a machine that has a train of cars which goes through a winding track. Roller…

Q: 14) A student drops a rock from the top of a building. If the rock is traveling at 19.1 m/s when it…

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Q: which of the three household objects cost the most to power per day

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.