Answer:
option A
Explanation:
given,
For exerted by the worker = 245 N
angle made with horizontal = 55°
we need to calculate Force which is not used to move the crate = ?
Movement of crate is due to the horizontal component of the force.
Crate will not move due to vertical force acting on the it.
hence, worker's force not used to move the crate is equal to 200.69
The correct answer is option A
Answer:
V = -0.3 m/sec.
Explanation:
5.0 x 0.12 + 2.0 x v = 0. Which means that V = -0.3 m/sec.
The -ve sign shows it moves in the opposite direction.
Ans: (a) & (c)
The density of a material is its mass per unit volume. This statement is proof enough to validate (c) as an answer. Now 1cm3 is also equal to 1mL, which makes (c)=(a).
<h2>
The momentum is greater for 0.1 kg bullet traveling at 300 m/s</h2>
Explanation:
Momentum = Mass x Velocity.
A 2500 kg truck moving at 0.01 m/s
Momentum = Mass x Velocity
Momentum = 2500 x 0.01 = 25 kgm/s
A 0.1 kg bullet traveling at 300 m/s
Momentum = Mass x Velocity
Momentum = 0.1 x 300 = 30kgm/s
Momentum of 0.1 kg bullet traveling at 300 m/s > Momentum of 2500 kg truck moving at 0.01 m/s.
The momentum is greater for 0.1 kg bullet traveling at 300 m/s
