Which safety spring at the base would help in lessening the impact of a falling heavy body? The one with higher or lower spring constant? Why?

Q: How much force is needed to make a rocket move in constant velocity in a frictionless outer space?…

A: If a rocket moves with constant velocity, its acceleration will be zero.

Q: The following resultants are acquired after solving a 2-force system. Which among them has the…

A: Force is a vector quantity and their resultant is given by vector addition methods .

Q: For how long a time must a tow truck pull with a force of 550 N on a stalled 1200 kg car to give it…

A:

Q: A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of…

A: step-1     given that, m=0.38 kg       v1 = +2.30 m/s       v2 =-160 m/s      ∆t =3.5 ×10-3 s

Q: The weight of a body does not produce any moment of force

A: Moment of force = torque = r̅ ×F̅

Q: A 2000 kg car, taveling to the right at 30 m/s, collides with a brick wall and comes to a rest in…

A: Given data The mass of the car is m = 2000 kg. The initial velocity of the car is u = 30 m/s. The…

Q: A glider strikes a 0.075-kg block so that its velocity changes by +35 m/s in 0.070 s. With what…

A: Given data:  Mass (m) = 0.075 kg Change in velocity (Δv) = +35 m/s Time (t) = 0.070 s Required: The…

Q: When a ball is tossed straight up,it momentarily comes to a stop at the top of its path. Is it in…

A: When the ball is tossed, the ball is under free fall after the ball leaves the hand.  Therefore, the…

Q: If two bodies of different masses, initially at rest, are acted upon by the same force for the same…

A: The acceleration is given by the force acting per unit mass.

Q: A glider strikes a 0.075-kg block so that its velocity changes by +35 m/s in 0.070 s. With what…

A: Correct option is (B) i e  average force is 37.5 N .

Q: Explain which of the four fundamental forces is responsible for a ball bouncing off the ground after…

A: Explain which of the four fundamental forces is responsible for a ball bouncing off the ground after…

Q: The weight of a typical high school physics student is closest to 1. 1500 N 2. 600 N 3. 120 N 4. 60…

A:

Q: A ball with a mass of 1 kg hits the ground vertically at 25 m / s and returns at 10 m / s. Since the…

A: Given data, mass of the ball = 1 kg initial speed of the ball = 25 m/s final speed of the ball = 10…

Q: Compute the initial upward acceleration of a rocket of mass 1.3 * 104 kg if the initial upward force…

A:

Q: You swing a bat and hit a heavy box with a force of 1600 N. If the box moves when you hit it, the…

A: Given data: The force exerted by the bat on the box F = 1600 N

Q: 4) The bodies shown are moving towards each other with velocities indicated. e =0.7. Determine the…

A: We apply conservation of momentum to solve the problem

Q: A 3-g bullet is fired horizontally into a 10-kg block of wood suspended by a rope from the ceiling.…

A: Given data: The mass of the bullet is mb=3 g. The mass of the block is mbk=10 kg. The height of the…

Q: If, by some suitable mechanism, the falling body had been given an initial downward push instead of…

A:

Q: A 3.45-g bullet embeds itself in a 1.27-kg block, which is attached to a spring of force constant…

A: Given value--- bullet mass = 3.45 g. block mass = 1.37 kg. force constant = 805 N/s. We have to…

Q: A 50-kg swimmer dives horizontally off a 450-kg raft. If the diver's speed immediately after leaving…

A: Given value--- mass of swimmer = 50 kg. mass of raft = 450 kg. speed of swimmer = 3 m/s. We have…

Q: A glider strikes a 0.075-kg block so that its velocity changes by +35 m/s in 0.070 s. With what…

A:

Q: 12. After falling from rest from a height of 30-m, a 0.50-kg ball rebounds upward, reaching a…

A: Given data The initial height from where the ball falls is given as h1 = 30 m. The mass of the ball…

Q: What net external force is exerted on a 1100-kg artillery shell fired from a battleship if the shell…

A: Mass of artillery shell M=1100kg Acceleration of artillery shell 'a'= 2.40 x 10^4

Q: The man jumps from the window of a burning hotel and lands in a safety net that stops him fall in…

A: The guy enters the net at velocity u=27m/s. the net stops him from falling in 0.5m i.e., the guy…

Q: The system shown remains at rest. The force of friction on the block on the slope is: W =20 N a = 3…

A:

Q: As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air…

A: Given,

Q: Two masses and a compressed spring are at rest on a frictionless surface. A string holds the system…

A: As no external force is acting so momentum remains same. Momentum before = momentum after

Q: Which of the following has more momentum? A jeepney at rest or a student running to attend his…

A: Momentum is directly proportional to the mass and velocity. p=mv

Q: An air bag inflates when a collision occurs, pro- tecting a passenger (the dummy in Figure CQ6.12)…

A: When collision occurs, car suddenly comes to rest. That is rate of change of momentum during…

Q: 6. Two children float motionlessly in a space station. The 20-kg girl pushes on the 40-kg boy and he…

A: Given: The mass of the girl is 20 kg. The mass of the boy is 40 kg. The final velocity of the boy is…

Q: As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air…

A:

Q: 35. Calculate the recoil velocity of a 5.0kg rifle that shoots a 0.05kg bullet at a speed of 150m/s.…

A: Given  Calculate the recoil velocity of a 5.0 kg rifle that shoots a 0.05 kg bullet at a speed of…

Q: A Federation starship ( 2.10×106 kg ) uses its tractor beam to pull a shuttlecraft ( 2.10×104 kg )…

A: Given information:Mass of the shuttle craft (ms) = 2.10 × 104 kgMass of the Federation ship (mf) =…

Q: The driver of a three-wheeler moving with a speed of 36 km/h sees a child standing in  the middle of…

A: Initial speed of the three-wheeler, u = 36 km/h  Final speed of the three-wheeler, v = 10 m/s  Time,…

Q: As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air…

A: According to the given condition, the initial speed (u) is zero and the final speed (v) is 22 m/s.…

Q: About 0.05 kg of blood is given a velocity of about 1 m/s upward in a time of t = 0.1s. Then the…

A: Given data: Mass of blood, m=0.05 kg Velocity, v=1 m/s Time, t=0.1 s Our question is o find the…

Q: While jumping on a trampoline, sometimes you land on your back and other times on your feet. In…

A: Write the expression for the impulse. ∆P=Fnet∆t

Q: 21. A cricket ball of mass 150 gm is moving with a velocity of 12 m/s and is hit by a bat so that…

A:

Q: Why are cars designed to crumple in front and back for safety? Why not for side collisions and…

A: The cars are designed to crumple in front and back for safety. The crumple zones redistributes force…

Q: A 12582 kg aeroplane is about to take off and the pilot increases the engine's thrust from 26 kN to…

A: Given, Mass of aeroplane = 12582 Kg Initial thrust F1 = 26 kN = 26 x 103 N Final thrust F2 = 124 kN…

Q: 2. A block with mass m; = 4.00 kg and a ball with mass m2 =6.00 first second of motion if both…

A: Using FBD and equation from Laws of motion we solve as follows

Q: 8. An object of mass 3 kg is at rest. Nowa force of F = 612 î+41 is applied on the object, then…

A:

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”